View source for Political party strength in Delaware

{{Short description|Politics in the US state of Delaware}}
{{more citations needed|date=January 2021}}
[[Delaware]] is a state in the [[Northeastern United States|Northeastern region]] of the United States.<ref>{{cite web |title=Census Regions and Divisions of the United States |url=https://www2.census.gov/geo/pdfs/maps-data/maps/reference/us_regdiv.pdf |access-date=March 19, 2025 |website=[[United States Census Bureau]]}}</ref> The [[Government of Delaware]] is composed of the executive branch, legislative branch, and judicial branch.<ref>{{Cite web |title=Departments of Government Chapter 90C. Department of Technology and Information |url=https://delcode.delaware.gov/title29/c090c/sc01/index.html |access-date=2025-03-19 |website=The Delaware Code Online}}</ref> Delaware's executive branch has five elected offices, they are [[Governor of Delaware|Governor]], [[Lieutenant Governor of Delaware|Lieutenant Governor]], [[Attorney General of Delaware|Attorney General]], State Treasurer, [[Delaware Auditor of Accounts|Auditor of Accounts]], and [[Delaware Department of Insurance|Insurance Commissioner]].<ref name=":0">{{Cite web |title=Voting in Delaware |url=https://delaware.gov/guides/voting-in-delaware/ |access-date=2025-03-19 |website=[[Delaware.gov]] |language=en-US}}</ref> The [[Delaware General Assembly|state legislature]] is made of the [[Delaware House of Representatives]] and [[Delaware Senate]].<ref>{{Cite web |title=Session Laws |url=https://legis.delaware.gov/SessionLaws |access-date=2025-03-19 |website=[[Delaware General Assembly]]}}</ref> From 1776 to 1792, the position of Governor was known as President.<ref name=":1" /> 

Additionally, the state sends two [[United States Senate|senators]] and one [[Representative (US)|representative]] to the [[United States Congress]].<ref name=":0" /> All three seats are elected [[at-large]].<ref>{{Cite news |date=2024-11-12 |title=Delaware At-Large Congressional District Election Results |url=https://www.nytimes.com/interactive/2024/11/05/us/elections/results-delaware-us-house-at-large.html |access-date=2025-03-19 |work=The New York Times |language=en-US |issn=0362-4331}}</ref><ref>{{Cite web |title=How Our Laws Are Made - Congress.gov Resources |url=https://www.congress.gov/help/learn-about-the-legislative-process/how-our-laws-are-made |access-date=2025-03-19 |website=[[Congress.gov]]}}</ref> As of the [[2024 United States House of Representatives election in Delaware|2024 House of Representatives election]], the state's representative is [[Sarah McBride]], the first openly transgender person elected to Congress.<ref>{{Cite news |last=Karni |first=Annie |date=2025-03-11 |title=Republican Refers to Transgender Member as a Man, Cutting Short a House Hearing |url=https://www.nytimes.com/2025/03/11/us/politics/sarah-mcbride-keith-self-transgender.html |access-date=2025-03-19 |work=The New York Times |language=en-US |issn=0362-4331}}</ref>

In the 1960s and 1970s the state's politics were dominated by the Republican party.<ref name=":2" /> In the 1980s the state began to shift towards the Democratic party.<ref>{{Cite web |last1=Corty |first1=Susanne P. |last2=Hanson |first2=Joseph J. |date=November 4, 1982 |title=The Governor returns to bitter defeat |url=https://www.newspapers.com/image/161748350/?match=3&terms=Tom%20Carper%20Harris%20McDowell |access-date=2025-03-19 |website=[[The News Journal]] |page=18 |language=en |via=[[Newspapers.com]]}}</ref> Writing for [[The News Journal|''The News Journal'']], William B. Golin credited the shift towards the Democratic party to the upset victory of then-County Councilman [[Joe Biden]] in the [[1972 United States Senate election in Delaware|1972 United States Senate election]].<ref name=":2">{{Cite web |last=Golin |first=William B. |title=How Joe Biden changed Delaware's — and America's — politics |url=https://www.delawareonline.com/story/opinion/2020/11/27/how-joe-biden-changed-delawares-and-americas-politics/6421726002/ |access-date=2025-03-19 |website=The News Journal |language=en-US}}</ref>

== 1777–1900 ==
{{sticky header}}
{| class="wikitable unsortable sticky-header-multi" style="text-align:center"
!scope=col rowspan="2" | Year
!scope=colgroup colspan="4" |Executive offices
!scope=colgroup colspan="2" |[[Delaware General Assembly|General Assembly]]
!scope=colgroup colspan=3|[[United States congressional delegations from Delaware|United States Congress]]
!scope=col rowspan=2 | [[United States presidential election|Electoral votes]]{{Efn|In years in which a presidential election was not held, the table indicates the winner of the most recent election.}}
|- style="height:2em"
!scope=col | [[List of governors of Delaware|Governor]]
!scope=col | [[Attorney General of Delaware|Attorney General]]
!scope=col | Treasurer
!scope=colgroup | [[Delaware Auditor of Accounts|Auditor]]
!scope=col | [[Delaware Senate|State Senate]]
!scope=col | [[Delaware House of Representatives|State House]]
!scope=col | [[List of United States senators from Delaware|U.S. Senator (Class I)]]
!scope=col | [[List of United States senators from Delaware|U.S. Senator (Class II)]]
!scope=col | [[List of United States representatives from Delaware|U.S. House]]
|- style="height:2em"
!scope=rowgroup rowspan=3|1777
|{{Party shading/Federalist}}|[[John McKinly]] <small>(NP/F)</small>{{efn|name=pres|President of Delaware<ref name=":1">{{Cite web |title=Gov. John McKinly |url=https://www.nga.org/governor/john-mckinly/ |access-date=March 28, 2025 |website=[[National Governors Association]]|date=7 January 2025 }}</ref>}}{{efn|Presidency ended after being captured by the British army during the [[American Revolutionary War|Revolutionary War]].}}
|rowspan=3 {{n/a}}
|
|
|
|
|
|
|
|rowspan=19|''no elections held''
|- style="height:2em"
|{{Party shading/Democratic-Republican}}|[[Thomas McKean]] <small>(NP/DR)</small>{{efn|name=pres}}{{efn|Succeeded to office upon the capture of McKinly and resigned upon the return of [[George Read (signer)|George Read]].}}
|- style="height:2em"
|rowspan=2 {{Party shading/Federalist}}|[[George Read (American politician, born 1733)|George Read]] <small>(NP/F)</small>{{efn|name=pres}}{{efn|name=succ-res|Succeeded to office upon the resignation of his predecessor.}}
|- style="height:2em"
!scope=rowgroup rowspan=2|1778
| rowspan="19" {{Party shading/Federalist}}|[[Gunning Bedford Jr.]] <small>({{Abbr|F|Federalist}})</small><ref>{{Cite web |title=The Founding Fathers: Delaware
|url=https://www.archives.gov/founding-docs/founding-fathers-delaware |website=[[National Archives and Records Administration]] |date=6 November 2015 |access-date=March 28, 2025}}</ref><ref name="AG" >{{Cite web |title=Delaware Former Attorneys General |url=https://www.naag.org/attorneys-general/past-attorneys-general/delaware-former-attorneys-general/ |website=[[National Association of Attorneys General]] |access-date=March 28, 2025}}</ref>
|- style="height:2em"
|rowspan=4 {{Party shading/Democratic-Republican}}|[[Caesar Rodney]] <small>(NP/DR)</small>{{efn|name=pres}}
|- style="height:2em"
!scope=row | 1779
|- style="height:2em"
!scope=row | 1780
|- style="height:2em"
!scope=rowgroup rowspan=2|1781
|- style="height:2em"
|rowspan=2 {{Party shading/Federalist}}|[[John Dickinson]] <small>(NP/F)</small>{{efn|name=pres}}{{efn|Resigned to accept election as president of [[Pennsylvania]].}}
|- style="height:2em"
!scope=rowgroup rowspan=2|1782
|- style="height:2em"
|rowspan=2 {{Party shading/Federalist}}|[[John Cook (governor)|John Cook]] <small>(NP/F)</small>{{efn|name=pres}}{{efn|name=succ-res}}
|- style="height:2em"
!scope=rowgroup rowspan=2|1783
|- style="height:2em"
|rowspan=4 {{Party shading/Democratic-Republican}}|[[Nicholas Van Dyke (politician, born 1738)|Nicholas Van Dyke]] <small>(NP/DR)</small>{{efn|name=pres}}
|- style="height:2em"
!scope=row | 1784
|- style="height:2em"
!scope=row | 1785
|- style="height:2em"
!scope=rowgroup rowspan=2|1786
|rowspan=2 {{Party shading/Federalist}}|[[Joshua Clayton]] <small>(NP/F)</small>
|- style="height:2em"
|rowspan=4 {{Party shading/Federalist}}|[[Thomas Collins (governor)|Thomas Collins]] <small>(NP/F)</small>{{efn|name=pres}}{{efn|name=died|Died in office.}}
|- style="height:2em"
!scope=row | 1787
|- style="height:2em"
!scope=row | 1788
|- style="height:2em"
!scope=rowgroup rowspan=3|1789
|
|
|
|
|rowspan=7 {{Party shading/Pro-Administration}}|[[George Read (American politician, born 1733)|George Read]] <small>(PA)</small>{{efn|name=resigned|Resigned.}}
|rowspan=4 {{Party shading/Anti-Administration}}|[[Richard Bassett (Delaware politician)|Richard Bassett]] <small>(AA)</small>
|rowspan=6 {{Party shading/Pro-Administration}}|[[John Vining]] <small>(PA)</small>
| rowspan="10" {{Party shading/Independent}} |[[George Washington|Washington]]/<br />[[John Adams|Adams]] <small>(I)</small> {{aye}}
|- style="height:2em"
|{{Party shading/Federalist}}|[[Jehu Davis]] <small>(NP/F)</small>{{efn|name=pres}}{{efn|name=succ-death|Succeeded to office upon the death of his predecessor.}}
|
|
|
|
|- style="height:2em"
|rowspan=4 {{Party shading/Federalist}}|[[Joshua Clayton]] <small>(NP/F)</small>{{efn|name=pres}}
|
|
|
|
|- style="height:2em"
!scope=row | 1790
| rowspan="13" |[[Nicholas Ridgely (born 1762)|Nicholas Ridgely]]
|
|
|
|
|- style="height:2em"
!scope=row | 1791
|
|
|
|
|rowspan=2 {{Party shading/Pro-Administration}}|[[Richard Bassett (Delaware politician)|Richard Bassett]] <small>(PA)</small>
|- style="height:2em"
!scope=row | 1792
|
|
|
|
|- style="height:2em"
!scope=row | 1793
| rowspan="4" {{Party shading/Federalist}} |[[Joshua Clayton]] <small>(F)</small>
|
|
|
|
| rowspan="3" {{Party shading/Pro-Administration}} |[[John Vining]] <small>(PA)</small>{{efn|name=resigned}}
|{{Party shading/Anti-Administration}}|[[John Patten (American politician)|John Patten]] <small>(AA)</small>
|- style="height:2em"
!scope=row | 1794
|
|
|
|
|''vacant''
| rowspan="2" {{Party shading/Pro-Administration}} |[[Henry Latimer (politician)|Henry Latimer]] <small>(PA)</small>{{efn|Successfully contested Patten's election.}}
|- style="height:2em"
!scope=rowgroup rowspan="2" |1795
|
|
|
|
|{{Party shading/Pro-Administration}}|[[Henry Latimer (politician)|Henry Latimer]] <small>(PA)</small>
|- style="height:2em"
|
|
|
|
| rowspan="7" {{Party shading/Federalist}}|[[Henry Latimer (politician)|Henry Latimer]] <small>(F)</small>{{efn|name=resigned}}
| rowspan="4" {{Party shading/Federalist}}|[[John Vining]] <small>(F)</small>
| rowspan="2" {{Party shading/Democratic-Republican}}|John Patten <small>(DR)</small>
|- style="height:2em"
!scope=row | 1796
| rowspan="2" {{Party shading/Federalist}} |[[Gunning Bedford Sr.]] <small>(F)</small>{{efn|name=died}}
|
|
|
|
| rowspan="5" {{Party shading/Federalist}} |[[John Adams|Adams]]/<br />[[Charles Cotesworth Pinckney|Pinckney]] <small>(F)</small> {{aye}}
|- style="height:2em"
!scope=rowgroup rowspan=2 | 1797
|
|
|rowspan=2 {{Party shading/Federalist}}|F majority
|rowspan=2 {{Party shading/Federalist}}|14F, 7DR
|rowspan=8 {{Party shading/Federalist}}|[[James A. Bayard (politician, born 1767)|James A. Bayard]] <small>(F)</small>
|- style="height:2em"
|rowspan=2 {{Party shading/Federalist}}|[[Daniel Rogers (politician)|Daniel Rogers]] <small>(F)</small>{{efn|name=succ-death}}
|
|
|- style="height:2em"
!scope=row | 1798
|
|
|{{Party shading/Federalist}}|F majority
|{{Party shading/Federalist}}|F majority
|{{Party shading/Federalist}}|[[Joshua Clayton]] <small>(F)</small>{{efn|name=died}}
|- style="height:2em"
!scope=row | 1799
|rowspan=3 {{Party shading/Federalist}}|[[Richard Bassett (Delaware politician)|Richard Bassett]] <small>(F)</small>{{efn|Resigned to accept appointment to U.S. District Court.}}
|
|
|{{Party shading/Federalist}}|F majority
|{{Party shading/Federalist}}|F majority
|rowspan=7 {{Party shading/Federalist}}|[[William H. Wells]] <small>(F)</small> {{efn|name=resigned}}
|- style="height:2em"
!scope=row | 1800
|
|
|{{Party shading/Federalist}}|F majority
|rowspan=24 {{Party shading/Federalist}}|14F, 7DR
|rowspan=5 {{Party shading/Federalist}}|[[John Adams|Adams]]/<br />[[Charles Cotesworth Pinckney|Pinckney]] <small>(F)</small> {{nay}}
|- style="height:2em"
!scope=rowgroup rowspan=2|1801
|rowspan=6 {{Party shading/Federalist}}|[[Nicholas Van Dyke (politician, born 1769)|Nicholas Van Dyke]] <small>(F)</small>
|
|
|rowspan=16 {{Party shading/Federalist}}|6F, 3DR
|rowspan=10 {{Party shading/Federalist}}|[[Samuel White (American politician)|Samuel White]] <small>(F)</small>{{efn|name=died}}
|- style="height:2em"
|{{Party shading/Federalist}}|[[James Sykes (governor)|James Sykes]] <small>(F)</small>{{efn|name=succ-res}}
|
|
|- style="height:2em"
!scope=row | 1802
|rowspan=3 {{Party shading/Democratic-Republican}}|[[David Hall (Delaware politician)|David Hall]] <small>(DR)</small>
|
|
|- style="height:2em"
!scope=row | 1803
|
|
|rowspan=2 {{Party shading/Democratic-Republican}}|[[Caesar Augustus Rodney]] <small>(DR)</small>
|- style="height:2em"
!scope=row | 1804
|
|
|rowspan=8 {{Party shading/Federalist}}|[[Charles Cotesworth Pinckney|Pinckney]]/<br />[[Rufus King|King]] <small>(F)</small> {{nay}}
|- style="height:2em"
!scope=row | 1805
|rowspan=3 {{Party shading/Federalist}}|[[Nathaniel Mitchell]] <small>(F)</small>
|
|
|rowspan=8 {{Party shading/Federalist}}|[[James A. Bayard (politician, born 1767)|James A. Bayard]] <small>(F)</small>{{efn|name=resigned}}
|rowspan=2 {{Party shading/Federalist}}|[[James M. Broom]] <small>(F)</small>{{efn|name=resigned}}
|- style="height:2em"
!scope=row | 1806
|rowspan=4 {{Party shading/Federalist}}|[[Outerbridge Horsey]] <small>(F)</small>
|
|
|- style="height:2em"
!scope=row | 1807
|
|
|''vacant''
|- style="height:2em"
!scope=row | 1808
|rowspan=3 {{Party shading/Federalist}}|[[George Truitt]] <small>(F)</small>
|rowspan=6 {{Party shading/Federalist}}|[[Henry Molleston]] <small>(F)</small>
|
|rowspan=3 {{Party shading/Federalist}}|[[Nicholas Van Dyke (politician, born 1769)|Nicholas Van Dyke]] <small>(F)</small>
|- style="height:2em"
!scope=row | 1809
|
|- style="height:2em"
!scope=row | 1810
|rowspan=5 {{Party shading/Federalist}}|[[Thomas Clayton]] <small>(F)</small>
|
|rowspan=12 {{Party shading/Federalist}}|[[Outerbridge Horsey]] <small>(F)</small>
|- style="height:2em"
!scope=row | 1811
|rowspan=3 {{Party shading/Democratic-Republican}}|[[Joseph Haslet]] <small>(DR)</small>
|
|rowspan=2 {{Party shading/Federalist}}|[[Henry M. Ridgely]] <small>(F)</small>
|- style="height:2em"
!scope=row | 1812
|
|rowspan=4 {{Party shading/Federalist}}|[[DeWitt Clinton|Clinton]]/<br />[[Jared Ingersoll|Ingersoll]] <small>(F)</small> {{nay}}
|- style="height:2em"
!scope=row | 1813
|
|rowspan=4 {{Party shading/Federalist}}|[[William H. Wells]] <small>(F)</small>
|rowspan=4 {{Party shading/Federalist}}|2F
|- style="height:2em"
!scope=row | 1814
|rowspan=3 {{Party shading/Federalist}}|[[Daniel Rodney]] <small>(F)</small>
|
|
|- style="height:2em"
!scope=row | 1815
|rowspan=18|[[James Rogers (Delaware)|James Rogers]]
|
|
|- style="height:2em"
!scope=row | 1816
|
|
|rowspan=2 {{Party shading/Federalist}}|7F, 2DR
|rowspan=4 {{Party shading/Federalist}}|[[Rufus King|King]]/<br />[[John Eager Howard|Howard]] <small>(F)</small> {{nay}}
|- style="height:2em"
!scope=row | 1817
|rowspan=3 {{Party shading/Federalist}}|[[John Clark (Delaware governor)|John Clark]] <small>(F)</small>
|
|
|rowspan=8 {{Party shading/Federalist}}|[[Nicholas Van Dyke (politician, born 1769)|Nicholas Van Dyke]] <small>(F)</small>
|rowspan=6 {{Party shading/Tie}}|1F, 1DR
|- style="height:2em"
!scope=row | 1818
|
|
|rowspan=5 {{Party shading/Federalist}}|6F, 3DR
|- style="height:2em"
!1819
|
|
|- style="height:2em"
!rowspan=2|1820
|{{Party shading/Federalist}}|[[Henry Molleston]] <small>(F)</small>{{efn|Died before taking office; never served as governor.}}
|
|
|rowspan=7 {{Party shading/Democratic-Republican}}|[[James Monroe|Monroe]]/<br />[[Daniel D. Tompkins|Tompkins]] <small>(DR)</small> {{aye}}
|- style="height:2em"
|{{Party shading/Federalist}}|[[Jacob Stout]] <small>(F)</small>{{efn|Assumed office upon the death of Governor-elect Molleston.}}
|
|
|- style="height:2em"
!1821
|rowspan=2 {{Party shading/Democratic-Republican}}|[[John Collins (governor)|John Collins]] <small>(DR)</small>{{efn|name=died}}
|
|
|''vacant''{{efn|name=legfail|Legislature failed to elect a senator.}}
|- style="height:2em"
!rowspan=2|1822
|
|
|rowspan=2 {{Party shading/Federalist}}|5DR, 4F
|rowspan=2 {{Party shading/Democratic-Republican}}|11DR, 10F
|rowspan=2 {{Party shading/Democratic-Republican}}|[[Caesar Augustus Rodney|Cesar Augustus Rodney]] <small>(DR)</small>{{efn|name=resigned}}
|rowspan=2 {{Party shading/Federalist}}|2F
|- style="height:2em"
|{{Party shading/Federalist}}|[[Caleb Rodney]] <small>(F)</small>{{efn|name=succ-death}}
|
|
|- style="height:2em"
!rowspan=2|1823
|{{Party shading/Democratic-Republican}}|[[Joseph Haslet]] <small>(DR)</small>{{efn|name=died}}
|
|
|rowspan=2 {{Party shading/Democratic-Republican}}|5DR, 4F
|rowspan=2 {{Party shading/Democratic-Republican}}|13DR, 8F
|rowspan=2 |''vacant''
|rowspan=2 |''vacant''{{efn|name=legfail}}
|rowspan=3 {{Party shading/Federalist}}|[[Louis McLane]] <small>(F)</small>
|- style="height:2em"
|{{Party shading/Democratic-Republican}}|[[Charles Thomas (Delaware governor)|Charles Thomas]] <small>(DR)</small>{{efn|name=succ-death}}
|
|
|- style="height:2em"
!1824
|rowspan=3 {{Party shading/Federalist}}|[[Samuel Paynter]] <small>(F)</small>
|
|
|rowspan=3 {{Party shading/Federalist}}|5F, 4DR
|{{Party shading/Federalist}}|14F, 7DR
|{{Party shading/Federalist}}|[[Thomas Clayton]] <small>(F)</small>
|{{Party shading/Federalist}}|[[Nicholas Van Dyke (politician, born 1769)|Nicholas Van Dyke]] <small>(F)</small>
|rowspan=4 {{Party shading/Democratic-Republican}}|[[Andrew Jackson|Jackson]]/<br />[[John C. Calhoun|Calhoun]] <small>(DR)</small> {{nay}}
|- style="height:2em"
!1825
|
|
|{{Party shading/Federalist}}|13F, 8DR
|rowspan=2 {{Party shading/National Republican}}|[[Thomas Clayton]] <small>(NR)</small>
|{{Party shading/National Republican}}|[[Nicholas Van Dyke (politician, born 1769)|Nicholas Van Dyke]] <small>(NR)</small>{{efn|name=died}}
|rowspan=2 {{Party shading/Jacksonian}}|[[Louis McLane]] <small>(J)</small>{{efn|name=resigned}}
|- style="height:2em"
!1826
|
|
|{{Party shading/Democratic-Republican}}|14DR, 7F
|{{Party shading/National Republican}}|[[Daniel Rodney]] <small>(NR)</small>{{efn|name=resigned}}
|- style="height:2em"
!1827
|rowspan=3 {{Party shading/Federalist}}|[[Charles Polk Jr.]] <small>(F)</small>
|
|
|{{Party shading/Democratic-Republican}}|5DR, 4F
|{{Party shading/Federalist}}|13F, 8DR
|rowspan=2 {{Party shading/Jacksonian}}|[[Louis McLane]] <small>(J)</small>{{efn|name=resigned}}
|rowspan=2 {{Party shading/Jacksonian}}|Henry M. Ridgely <small>(J)</small>
|''vacant''
|- style="height:2em"
!1828
|
|
|{{Party shading/Anti-Jacksonian}}|5A-J, 3J, 1?
|{{Party shading/Anti-Jacksonian}}|11A-J, 10J
|rowspan=3 {{Party shading/National Republican}}|[[Kensey Johns Jr.]] <small>(NR)</small>
|rowspan=4 {{Party shading/Anti-Jacksonian}}|[[John Quincy Adams|Adams]]/<br />[[Richard Rush|Rush]] <small>(NR)</small> {{nay}}
|- style="height:2em"
!1829
|
|
|rowspan=2 {{Party shading/National Republican}}|5NR, 4D
|rowspan=2 {{Party shading/National Republican}}|14NR, 7D
|''vacant''
|rowspan=8 {{Party shading/National Republican}}|[[John M. Clayton]] <small>(NR)</small>{{efn|name=resigned}}
|- style="height:2em"
!1830
|rowspan=3 {{Party shading/National Republican}}|[[David Hazzard]] <small>(NR)</small>
|rowspan=5|[[Robert Frame]]
|
|
|rowspan=7 {{Party shading/National Republican}}|[[Arnold Naudain]] <small>(NR)</small>{{efn|name=resigned}}
|- style="height:2em"
!1831
|
|
|rowspan=4 {{Party shading/National Republican}}|7NR, 2D
|{{Party shading/National Republican}}|16NR, 5D
|rowspan=7 {{Party shading/National Republican}}|[[John J. Milligan]] <small>(NR)</small>
|- style="height:2em"
!1832
|
|
|rowspan=3 {{Party shading/National Republican}}|14NR, 7D
|rowspan=4 {{Party shading/National Republican}}|[[Henry Clay|Clay]]/<br />[[John Sergeant (politician)|Sergeant]] <small>(NR)</small> {{nay}}
|- style="height:2em"
!1833
|rowspan=4 {{Party shading/Democratic}}|[[Caleb P. Bennett]] <small>(D)</small>{{efn|name=died}}
|
|
|- style="height:2em"
!1834
|
|
|- style="height:2em"
!1835
|rowspan=6|[[James Rogers (Delaware)|James Rogers]]
|
|
|rowspan=5 {{Party shading/Whig}}|6W, 3D
|rowspan=5 {{Party shading/Whig}}|14W, 7D
|- style="height:2em"
!rowspan=2|1836
|
|
|rowspan=5 {{Party shading/Whig}}|[[William Henry Harrison|Harrison]]/<br />[[Francis Granger|Granger]] <small>(W)</small> {{nay}}
|- style="height:2em"
|{{Party shading/Whig}}|[[Charles Polk Jr.]] <small>(W)</small>{{efn|name=succ-death}}
|
|
|{{Party shading/National Republican}}|[[Richard H. Bayard]] <small>(NR)</small>
|{{Party shading/National Republican}}|[[Thomas Clayton]] <small>(NR)</small>
|- style="height:2em"
!1837
|rowspan=4 {{Party shading/Whig}}|[[Cornelius P. Comegys]] <small>(W)</small>
|
|
|rowspan=3 {{Party shading/Whig}}|[[Richard H. Bayard]] <small>(W)</small>{{efn|name=resigned}}
|rowspan=12 {{Party shading/Whig}}|[[Thomas Clayton]] <small>(W)</small>
|rowspan=2 {{Party shading/Whig}}|[[John J. Milligan]] <small>(W)</small>
|- style="height:2em"
!1838
|
|
|- style="height:2em"
!1839
|
|
|rowspan=2 {{Party shading/Democratic}}|6D, 3W
|rowspan=2 {{Party shading/Democratic}}|13D, 8W
|rowspan=2 {{Party shading/Democratic}}|[[Thomas Robinson Jr.]] <small>(D)</small>
|- style="height:2em"
!1840
|rowspan=12|[[Edward W. Gilpin]]
|
|
|''vacant''
|rowspan=4 {{Party shading/Whig}}|[[William Henry Harrison|Harrison]]/<br />[[John Tyler|Tyler]] <small>(W)</small> {{aye}}
|- style="height:2em"
!1841
|rowspan=4 {{Party shading/Whig}}|[[William B. Cooper (Delaware politician)|William B. Cooper]] <small>(W)</small>
|
|
|rowspan=2 {{Party shading/Democratic}}|5D, 4W
|rowspan=2 {{Party shading/Whig}}|21W
|rowspan=4 {{Party shading/Whig}}|[[Richard H. Bayard]] <small>(W)</small>
|rowspan=4 {{Party shading/Whig}}|[[George B. Rodney]] <small>(W)</small>
|- style="height:2em"
!1842
|
|
|- style="height:2em"
!1843
|
|
|rowspan=6 {{Party shading/Whig}}|7W, 2D
|rowspan=2 {{Party shading/Whig}}|14W, 7D
|- style="height:2em"
!1844
|
|
|rowspan=6 {{Party shading/Whig}}|[[Henry Clay|Clay]]/<br />[[Theodore Frelinghuysen|Frelinghuysen]] <small>(W)</small> {{nay}}
|- style="height:2em"
!1845
|rowspan=2 {{Party shading/Whig}}|[[Thomas Stockton (politician)|Thomas Stockton]] <small>(W)</small>{{efn|name=died}}
|
|
|rowspan=4 {{Party shading/Whig}}|6W, 3D
|rowspan=6 {{Party shading/Whig}}|[[John M. Clayton]] <small>(W)</small>{{efn|name=res-secstate|Resigned to become [[United States Secretary of State]].}}
|rowspan=8 {{Party shading/Whig}}|[[John W. Houston]] <small>(W)</small>
|- style="height:2em"
!rowspan=3|1846
|
|
|- style="height:2em"
|{{Party shading/Whig}}|[[Joseph Maull]] <small>(W)</small>{{efn|name=died}}{{efn|name=succ-death}}
|
|
|- style="height:2em"
|{{Party shading/Whig}}|[[William Temple (politician)|William Temple]] <small>(W)</small>{{efn|name=succ-death}}
|
|
|- style="height:2em"
!1847
|rowspan=4 {{Party shading/Democratic}}|[[William Tharp]] <small>(D)</small>
|
|
|rowspan=2 {{Party shading/Whig}}|5W, 4D
|rowspan=2 {{Party shading/Whig}}|11W, 10D
|rowspan=6 {{Party shading/Whig}}|[[Presley Spruance]] <small>(W)</small>
|- style="height:2em"
!1848
|
|
|rowspan=4 {{Party shading/Whig}}|[[Zachary Taylor|Taylor]]/<br />[[Millard Fillmore|Fillmore]] <small>(W)</small> {{aye}}
|- style="height:2em"
!1849
|
|
|rowspan=2 {{Party shading/Whig}}|6W, 3D
|rowspan=2 {{Party shading/Whig}}|13W, 7D, 1?
|rowspan=2 {{Party shading/Whig}}|[[John Wales]] <small>(W)</small>
|- style="height:2em"
!1850
|rowspan=5 {{Party shading/Democratic}}|[[Willard Saulsbury Sr.]] <small>(D)</small>
|
|
|- style="height:2em"
!1851
|rowspan=4 {{Party shading/Democratic}}|[[William H. H. Ross]] <small>(D)</small>
|
|
|rowspan=4 {{Party shading/Democratic}}|5D, 4W
|rowspan=2 {{Party shading/Democratic}}|14D, 7W
|rowspan=13 {{Party shading/Democratic}}|[[James A. Bayard Jr.]] <small>(D)</small>
|rowspan=4 {{Party shading/Democratic}}|[[George R. Riddle]] <small>(D)</small>
|- style="height:2em"
!1852
|
|
|rowspan=4 {{Party shading/Democratic}}|[[Franklin Pierce|Pierce]]/<br />[[William R. King|King]] <small>(D)</small> {{aye}}
|- style="height:2em"
!1853
|
|
|rowspan=2 {{Party shading/Whig}}|13W, 8D
|rowspan=4 {{Party shading/Whig}}|[[John M. Clayton]] <small>(W)</small>
|- style="height:2em"
!1854
|
|
|- style="height:2em"
!1855
|rowspan=4 {{Party shading/Know-Nothing}}|[[Peter F. Causey]] <small>(KN)</small>
|rowspan=5 {{Party shading/Republican}}|[[George P. Fisher]] <small>(R)</small>
|
|
|rowspan=2 {{Party shading/Know-Nothing}}|6KN, 2D, 1W
|rowspan=2 {{Party shading/Know-Nothing}}|19KN, 2D
|rowspan=2 {{Party shading/Know-Nothing}}|[[Elisha D. Cullen]] <small>(KN)</small>
|- style="height:2em"
!1856
|
|
|rowspan=4 {{Party shading/Democratic}}|[[James Buchanan|Buchanan]]/<br />[[John C. Breckinridge|Breckinridge]] <small>(D)</small> {{aye}}
|- style="height:2em"
!1857
|
|
|rowspan=2 {{Party shading/Democratic}}|5D, 4O
|rowspan=2 {{Party shading/Democratic}}|21D
|rowspan=2 {{Party shading/Whig}}|[[Joseph P. Comegys]] <small>(W)</small>
|rowspan=4 {{Party shading/Democratic}}|[[William G. Whiteley]] <small>(D)</small>
|- style="height:2em"
!1858
|
|
|- style="height:2em"
!1859
|rowspan=4 {{Party shading/Democratic}}|[[William Burton (governor)|William Burton]] <small>(D)</small>
|
|
|rowspan=2 {{Party shading/Democratic}}|7D, 2O
|rowspan=2 {{Party shading/Democratic}}|14D, 7O
|rowspan=13 {{Party shading/Democratic}}|[[Willard Saulsbury Sr.]] <small>(D)</small>
|- style="height:2em"
!1860
|rowspan=4|[[Alfred Wooten]]
|
|
|rowspan=4 {{Party shading/Southern Democratic}}|[[John C. Breckinridge|Breckinridge]]/<br />[[Joseph Lane|Lane]] <small>({{abbr|SD|Southern Democratic}})</small> {{Nay}}
|- style="height:2em"
!1861
|
|
|rowspan=4 {{Party shading/Democratic}}|5D, 4R
|rowspan=2 {{Party shading/Republican}}|11R, 10D
|rowspan=2 {{Party shading/Unionist}}|[[George P. Fisher]] <small>(U)</small>
|- style="height:2em"
!1862
|
|
|- style="height:2em"
!1863
|rowspan=3 {{Party shading/Republican}}|[[William Cannon]] <small>(R)</small>{{efn|name=died}}
|
|
|rowspan=5 {{Party shading/Democratic}}|14D, 7R
|{{Party shading/Democratic}}|[[William Temple (politician)|William Temple]] <small>(D)</small>{{efn|name=died}}
|- style="height:2em"
!1864
|rowspan=6 {{Party shading/Republican}}|[[Jacob Moore]] <small>(R)</small>
|
|
|rowspan=4 {{Party shading/Democratic}}|[[George R. Riddle]] <small>(D)</small>
|{{Party shading/Republican}}|[[Nathaniel B. Smithers]] <small>(R)</small>
|rowspan=5 {{Party shading/Democratic}}|[[George B. McClellan|McClellan]]/<br />[[George H. Pendleton|Pendleton]] <small>(D)</small> {{nay}}
|- style="height:2em"
!rowspan=2|1865
|
|
|rowspan=5 {{Party shading/Democratic}}|6D, 3R
|rowspan=5 {{Party shading/Democratic}}|[[John A. Nicholson]] <small>(D)</small>
|- style="height:2em"
|rowspan=6 {{Party shading/Democratic}}|[[Gove Saulsbury]] <small>(D)</small>{{efn|Assumed office upon the death of Cannon, then was elected to office in his own right.}}
|
|
|- style="height:2em"
!1866
|
|
|- style="height:2em"
!1867
|
|
|rowspan=2 {{Party shading/Democratic}}|15D, 6R
|rowspan=2 {{Party shading/Democratic}}|[[James A. Bayard Jr.]] <small>(D)</small>
|- style="height:2em"
!1868
|
|
|rowspan=4 {{Party shading/Democratic}}|[[Horatio Seymour|Seymour]]/<br />[[Francis Preston Blair Jr.|Blair]] <small>(D)</small> {{nay}}
|- style="height:2em"
!1869
|rowspan=5 {{Party shading/Democratic}}|[[Charles B. Lore]] <small>(D)</small>
|
|
|rowspan=4 {{Party shading/Democratic}}|9D
|rowspan=12 {{Party shading/Democratic}}|21D
|rowspan=16 {{Party shading/Democratic}}|[[Thomas F. Bayard]] <small>(D)</small>{{efn|name=res-secstate}}
|rowspan=4 {{Party shading/Democratic}}|[[Benjamin T. Biggs]] <small>(D)</small>
|- style="height:2em"
!1870
|
|
|- style="height:2em"
!1871
|rowspan=4 {{Party shading/Democratic}}|[[James Ponder]] <small>(D)</small>
|
|
|rowspan=18 {{Party shading/Democratic}}|[[Eli Saulsbury]] <small>(D)</small>
|- style="height:2em"
!1872
|
|
|rowspan=4 {{Party shading/Republican}}|[[Ulysses S. Grant|Grant]]/<br />[[Henry Wilson|Wilson]] <small>(R)</small> {{aye}}
|- style="height:2em"
!1873
|
|
|rowspan=4 {{Party shading/Democratic}}|8D, 1R
|rowspan=2 {{Party shading/Republican}}|[[James R. Lofland]] <small>(R)</small>
|- style="height:2em"
!1874
|rowspan=5 {{Party shading/Democratic}}|[[John B. Penington]] <small>(D)</small>
|
|
|- style="height:2em"
!1875
|rowspan=4 {{Party shading/Democratic}}|[[John P. Cochran]] <small>(D)</small>
|
|
|rowspan=4 {{Party shading/Democratic}}|[[James Williams (Delaware politician)|James Williams]] <small>(D)</small>
|- style="height:2em"
!1876
|
|
|rowspan=4 {{Party shading/Democratic}}|[[Samuel J. Tilden|Tilden]]/<br />[[Thomas A. Hendricks|Hendricks]] <small>(D)</small> {{nay}}
|- style="height:2em"
!1877
|
|
|rowspan=4 {{Party shading/Democratic}}|9D
|- style="height:2em"
!1878
|
|
|- style="height:2em"
!1879
|rowspan=4 {{Party shading/Democratic}}|[[John W. Hall]] <small>(D)</small>
|rowspan=6 {{Party shading/Democratic}}|[[George Gray (Delaware politician)|George Gray]] <small>(D)</small>
|
|
|rowspan=4 {{Party shading/Democratic}}|[[Edward L. Martin]] <small>(D)</small>
|- style="height:2em"
!1880
|
|
|rowspan=4 {{Party shading/Democratic}}|[[Winfield Scott Hancock|Hancock]]/<br />[[William Hayden English|English]] <small>(D)</small> {{nay}}
|- style="height:2em"
!1881
|
|
|rowspan=2 {{Party shading/Democratic}}|8D, 1R
|rowspan=2 {{Party shading/Democratic}}|14D, 7R
|- style="height:2em"
!1882
|
|
|- style="height:2em"
!1883
|rowspan=4 {{Party shading/Democratic}}|[[Charles C. Stockley]] <small>(D)</small>
|
|
|rowspan=2 {{Party shading/Democratic}}|7D, 2R
|rowspan=6 {{Party shading/Democratic}}|21D
|rowspan=4 {{Party shading/Democratic}}|[[Charles B. Lore]] <small>(D)</small>
|- style="height:2em"
!1884
|
|
|rowspan=4 {{Party shading/Democratic}}|[[Grover Cleveland|Cleveland]]/<br />[[Thomas A. Hendricks|Hendricks]] <small>(D)</small> {{aye}}
|- style="height:2em"
!1885
|rowspan=2|[[John H. Paynter (politician)|John H. Paynter]]
|
|
|rowspan=4 {{Party shading/Democratic}}|9D
|rowspan=15 {{Party shading/Democratic}}|[[George Gray (Delaware politician)|George Gray]] <small>(D)</small>
|- style="height:2em"
!1886
|
|
|- style="height:2em"
!1887
|rowspan=4 {{Party shading/Democratic}}|[[Benjamin T. Biggs]] <small>(D)</small>
|rowspan=5|[[John Biggs (Delaware)|John Biggs]]
|
|
|rowspan=4 {{Party shading/Democratic}}|[[John B. Penington]] <small>(D)</small>
|- style="height:2em"
!1888
|
|
|rowspan=4 {{Party shading/Democratic}}|[[Grover Cleveland|Cleveland]]/<br />[[Allen G. Thurman|Thurman]] <small>(D)</small> {{nay}}
|- style="height:2em"
!1889
|
|
|rowspan=2 {{Party shading/Republican}}|5R, 4D
|rowspan=4 {{Party shading/Republican}}|14R, 7D
|rowspan=6 {{Party shading/Republican}}|[[Anthony Higgins (politician)|Anthony Higgins]] <small>(R)</small>
|- style="height:2em"
!1890
|
|
|- style="height:2em"
!1891
|rowspan=4 {{Party shading/Democratic}}|[[Robert J. Reynolds]] <small>(D)</small>
|
|
|rowspan=2 {{Party shading/Democratic}}|7D, 2R
|rowspan=4 {{Party shading/Democratic}}|[[John W. Causey]] <small>(D)</small>
|- style="height:2em"
!1892
|rowspan=3|[[John R. Nicholson]]
|
|
| rowspan="5" {{Party shading/Democratic}} |[[Grover Cleveland|Cleveland]]/<br />[[Adlai Stevenson I|Stevenson]] <small>(D)</small> {{aye}}
|- style="height:2em"
!1893
|
|
|rowspan=7 {{Party shading/Democratic}}|5D, 4R
|rowspan=2 {{Party shading/Democratic}}|21D
|- style="height:2em"
!1894
|
|
|- style="height:2em"
!rowspan=2|1895
|{{Party shading/Republican}}|[[Joshua H. Marvil]] <small>(R)</small>{{efn|name=died}}
|rowspan=8|[[Robert C. White (Delaware politician)|Robert C. White]]
|
| rowspan="5" |Beniah L. Lewis
|rowspan=3 {{Party shading/Republican}}|15R, 6D
|rowspan=3|''vacant''{{efn|name=legfail}}
|rowspan=3 {{Party shading/Republican}}|[[Jonathan S. Willis]] <small>(R)</small>
|- style="height:2em"
|rowspan=2 {{Party shading/Democratic}}|[[William T. Watson]] <small>(D)</small>{{efn|name=succ-death}}
|
|- style="height:2em"
!1896
|
|rowspan=4 {{Party shading/Republican}}|[[William McKinley|McKinley]]/<br />[[Garret Hobart|Hobart]] <small>(R)</small> {{aye}}
|- style="height:2em"
!1897
|rowspan=5 {{Party shading/Democratic}}|[[Ebe W. Tunnell]] <small>(D)</small>
|
|rowspan=2 {{Party shading/Democratic}}|20D, 1R
|rowspan=5 {{Party shading/Democratic}}|[[Richard R. Kenney]] <small>(D)</small>
|rowspan=2 {{Party shading/Democratic}}|[[L. Irving Handy]] <small>(D)</small>
|- style="height:2em"
!1898
|
|- style="height:2em"
!1899
|rowspan=3 {{Party shading/Republican}}|[[L. Heisler Ball]] <small>(R)</small>
|John A. Lingo
|rowspan=3 {{Party shading/Democratic}}|9D, 8R
|rowspan=3 {{Party shading/Republican}}|22R, 13D
| rowspan="3" |''vacant''{{efn|name=legfail}}
|rowspan=2 {{Party shading/Republican}}|[[John H. Hoffecker]] <small>(R)</small>{{efn|name=died}}
|- style="height:2em"
!rowspan=2|1900
| rowspan="2" |Isaac N. Fooks
| rowspan="2" {{Party shading/Republican}} |[[William McKinley|McKinley]]/<br />[[Theodore Roosevelt|Roosevelt]] <small>(R)</small> {{aye}}
|- style="height:2em"
|{{Party shading/Republican}}|[[Walter O. Hoffecker]] <small>(R)</small>
|- style="height:2em"
!rowspan=2|Year!![[List of governors of Delaware|Governor]]!![[Attorney General of Delaware|Attorney General]]!!Treasurer!!Auditor!![[Delaware Senate|State Senate]]!![[Delaware House of Representatives|State House]]!![[List of United States senators from Delaware|U.S. Senator (Class I)]]!![[List of United States senators from Delaware|U.S. Senator (Class II)]]!![[List of United States representatives from Delaware|U.S. House]]!! rowspan="2" |[[United States presidential election|Electoral votes]]
|- style="height:2em"
! colspan="4" |Executive offices!!colspan=2|[[Delaware General Assembly|General Assembly]]!!colspan=3|[[United States congressional delegations from Delaware|United States Congress]]
|}

==1901–present==
{{sticky header}}
{| class="wikitable sortable sticky-header-multi" style="text-align:center"
!rowspan=2 class=unsortable | Year
!colspan=6|Executive offices
!colspan=2|[[Delaware General Assembly|General Assembly]]
!colspan=3|[[United States congressional delegations from Delaware|United States Congress]]
!rowspan=2 class=unsortable | [[United States presidential election|Electoral votes]]
|- style="height:2em"
! class=unsortable | [[List of governors of Delaware|Governor]]
! class=unsortable | [[Lieutenant Governor of Delaware|Lt. Governor]]
! class=unsortable | [[Attorney General of Delaware|Attorney<br />General]]
! class=unsortable | Treasurer
! class=unsortable | [[Delaware Auditor of Accounts|Auditor]]
! class=unsortable | Insurance<br/>Commissioner
! class=unsortable | [[Delaware Senate|State<br />Senate]]
! class=unsortable | [[Delaware House of Representatives|State<br />House]]
! class=unsortable | [[List of United States senators from Delaware|U.S. Senator<br />(Class I)]]
! class=unsortable | [[List of United States senators from Delaware|U.S. Senator<br />(Class II)]]
! class=unsortable | [[List of United States representatives from Delaware|U.S. House]]
|- style="height:2em"
!1901
|rowspan=4 {{Party shading/Republican}}|[[John Hunn (governor)|John Hunn]] {{small|(R)}}
|rowspan=4 {{Party shading/Republican}}|[[Philip L. Cannon]] {{small|(R)}}
|rowspan=4|[[Herbert H. Ward]]
|rowspan=4 |Martin B. Burris
|rowspan=4 |Prunal B. Norman
|George W. Marshall
|rowspan=2 {{Party shading/Republican}}|9R, 8D
|rowspan=4 {{Party shading/Republican}}|20R, 15D
|rowspan=2 |''vacant{{efn|name=legfail}}''
|rowspan=2|''vacant''{{efn|name=legfail}}
|rowspan=2 {{Party shading/Republican}}|[[L. Heisler Ball]] {{small|(R)}}
|rowspan=3|
|- style="height:2em"
!1902
|
|- style="height:2em"
!1903
|
|rowspan=4 {{Party shading/Republican}}|10R, 7D
|rowspan=2 {{Party shading/Republican}}|[[L. Heisler Ball]] {{small|(R)}}
|rowspan=4 {{Party shading/Republican}}|[[J. Frank Allee]] {{small|(R)}}
|rowspan=2 {{Party shading/Democratic}}|[[Henry A. Houston]] {{small|(D)}}
|- style="height:2em"
!1904
|
|rowspan=4 {{Party shading/Republican}}|[[Theodore Roosevelt|Roosevelt]]/<br />[[Charles W. Fairbanks|Fairbanks]] {{small|(R)}} {{aye}}
|- style="height:2em"
!1905
|rowspan=4 {{Party shading/Republican}}|[[Preston Lea]] {{small|(R)}}
|rowspan=4 {{Party shading/Republican}}|[[Isaac T. Parker]] {{small|(R)}}
|rowspan=4|[[Robert H. Richards (politician)|Robert H. Richards]]
|
|
|
|rowspan=2 {{Party shading/Republican}}|21R, 14D
|rowspan=2|''vacant''{{efn|name=legfail}}
|rowspan=4 {{Party shading/Republican}}|[[Hiram R. Burton]] {{small|(R)}}
|- style="height:2em"
!1906
|
|
|
|- style="height:2em"
!1907
|
|
|
|rowspan=4 {{Party shading/Republican}}|11R, 6D
|rowspan=2 {{Party shading/Republican}}|25R, 10D
|rowspan=10 {{Party shading/Republican}}|[[Henry A. du Pont]] {{small|(R)}}
|rowspan=6 {{party shading/Republican}}|[[Harry A. Richardson]] {{small|(R)}}
|- style="height:2em"
!1908
|
|
|
|rowspan=4 {{Party shading/Republican}}|[[William Howard Taft|Taft]]/<br />[[James S. Sherman|Sherman]] {{small|(R)}} {{aye}}
|- style="height:2em"
!1909
|rowspan=4 {{Party shading/Republican}}|[[Simeon S. Pennewill]] {{small|(R)}}
|rowspan=4 {{Party shading/Republican}}|[[John M. Mendinhall]] {{small|(R)}}
|rowspan=4|[[Andrew C. Gray]]
|
|
|
|rowspan=2 {{Party shading/Democratic}}|18D, 17R
|rowspan=4 {{Party shading/Republican}}|[[William H. Heald]] {{small|(R)}}
|- style="height:2em"
!1910
|
|
|
|- style="height:2em"
!1911
|
|
|
|rowspan=6 {{Party shading/Republican}}|9R, 8D
|rowspan=2 {{Party shading/Republican}}|22R, 13D
|- style="height:2em"
!1912
|
|
|
|rowspan=4 {{Party shading/Democratic}}|[[Woodrow Wilson|Wilson]]/<br />[[Thomas R. Marshall|Marshall]] {{small|(D)}} {{aye}}
|- style="height:2em"
!1913
|rowspan=4 {{Party shading/Republican}}|[[Charles R. Miller (politician)|Charles R. Miller]] {{small|(R)}}
|rowspan=4 {{Party shading/Democratic}}|[[Colen Ferguson]] {{small|(D)}}
|rowspan=4 {{Party shading/Democratic}}|[[Josiah O. Wolcott]] {{small|(D)}}
|
|
|
|rowspan=2 {{Party shading/Democratic}}|21D, 14R
|rowspan=6 {{Party shading/Democratic}}|[[Willard Saulsbury Jr.]] {{small|(D)}}
|rowspan=2 {{Party shading/Democratic}}|[[Franklin Brockson]] {{small|(D)}}
|- style="height:2em"
!1914
|
|
|
|- style="height:2em"
!1915
|
|
|
|rowspan=2 {{Party shading/Republican}}|19R, 16D
|rowspan=2 {{Party shading/Republican}}|[[Thomas W. Miller]] {{small|(R)}}
|- style="height:2em"
!1916
|
|
|
|rowspan=4 {{Party shading/Republican}}|[[Charles Evans Hughes|Hughes]]/<br />[[Charles W. Fairbanks|Fairbanks]] {{small|(R)}} {{nay}}
|- style="height:2em"
!1917
|rowspan=4 {{Party shading/Republican}}|[[John G. Townsend Jr.]] {{small|(R)}}
|rowspan=4 {{Party shading/Democratic}}|[[Lewis E. Eliason]] {{small|(D)}}
|rowspan=4|[[David J. Reinhardt]]
|
|
|
|rowspan=4 {{Party shading/Republican}}|10R, 7D
|rowspan=2 {{Party shading/Democratic}}|19D, 16R
|rowspan=4 {{Party shading/Democratic}}|[[Josiah O. Wolcott]] {{small|(D)}}{{efn|Resigned to become Chancellor of the [[Delaware Court of Chancery]].}}
|rowspan=2 {{Party shading/Democratic}}|[[Albert F. Polk]] {{small|(D)}}
|- style="height:2em"
!1918
|
|
|
|- style="height:2em"
!1919
|
|
|
|rowspan=2 {{Party shading/Republican}}|23R, 12D
|rowspan=6 {{Party shading/Republican}}|[[L. Heisler Ball]] {{small|(R)}}
|rowspan=4 {{Party shading/Republican}}|[[Caleb R. Layton]] {{small|(R)}}
|- style="height:2em"
!1920
|
|
|
|rowspan=4 {{Party shading/Republican}}|[[Warren G. Harding|Harding]]/<br />[[Calvin Coolidge|Coolidge]] {{small|(R)}} {{aye}}
|- style="height:2em"
!1921
|rowspan=4 {{Party shading/Republican}}|[[William D. Denney]] {{small|(R)}}
|rowspan=4 {{Party shading/Republican}}|[[J. Danforth Bush]] {{small|(R)}}
|rowspan=4|[[Sylvester D. Townsend Jr.]]
|
|
|
|rowspan=2 {{Party shading/Republican}}|12R, 5D
|rowspan=4 {{Party shading/Democratic}}|18D, 17R
|rowspan=2 {{Party shading/Republican}}|[[T. Coleman du Pont]] {{small|(R)}}{{efn|name=app|Appointed to fill vacancy.}}
|- style="height:2em"
!1922
|
|
|
|- style="height:2em"
!1923
|
|
|
|rowspan=2 {{Party shading/Republican}}|11R, 6D
|rowspan=6 {{Party shading/Democratic}}|[[Thomas F. Bayard Jr.]] {{small|(D)}}
|rowspan=2 {{Party shading/Democratic}}|[[William H. Boyce]] {{small|(D)}}
|- style="height:2em"
!1924
|
|
|
|rowspan=4 {{Party shading/Republican}}|[[Calvin Coolidge|Coolidge]]/<br />[[Charles G. Dawes|Dawes]] {{small|(R)}} {{aye}}
|- style="height:2em"
!1925
|rowspan=4 {{Party shading/Republican}}|[[Robert P. Robinson (Delaware politician)|Robert P. Robinson]] {{small|(R)}}
|rowspan=4 {{Party shading/Republican}}|[[James H. Anderson (politician)|James H. Anderson]] {{small|(R)}}
|rowspan=4|[[Clarence A. Southerland]]
|
|
|
|rowspan=4 {{Party shading/Democratic}}|9D, 8R
|rowspan=2 {{Party shading/Republican}}|22R, 13D
|rowspan=4 {{Party shading/Republican}}|[[T. Coleman du Pont]] {{small|(R)}}{{efn|Resigned due to poor health.}}
|rowspan=8 {{Party shading/Republican}}|[[Robert G. Houston]] {{small|(R)}}
|- style="height:2em"
!1926
|
|
|
|- style="height:2em"
!1927
|
|rowspan=2 {{Party shading/Democratic}}|[[Jesse S. Cooper Jr.]] {{small|(D)}}
|
|rowspan=2 {{Party shading/Republican}}|18R, 17D
|- style="height:2em"
!1928
|
|
|rowspan=4 {{Party shading/Republican}}|[[Herbert Hoover|Hoover]]/<br />[[Charles Curtis|Curtis]] {{small|(R)}} {{aye}}
|- style="height:2em"
!1929
|rowspan=9 {{Party shading/Republican}}|[[C. Douglass Buck]] {{small|(R)}}
|rowspan=4 {{Party shading/Republican}}|[[James H. Hazel]] {{small|(R)}}
|rowspan=4|[[Reuben Satterthwaite Jr.]]
|rowspan=4 {{Party shading/Republican}}|[[George S. Williams]] {{small|(R)}}
|
|
|rowspan=2 {{Party shading/Republican}}|9R, 8D
|rowspan=2 {{Party shading/Republican}}|26R, 9D
|rowspan=13 {{Party shading/Republican}}|[[John G. Townsend Jr.]] {{small|(R)}}
|rowspan=9 {{Party shading/Republican}}|[[Daniel O. Hastings]] {{small|(R)}}{{efn|name=app}}
|- style="height:2em"
!1930
|
|
|- style="height:2em"
!1931
|
|
|rowspan=2 {{Party shading/Republican}}|12R, 5D
|rowspan=2 {{Party shading/Republican}}|22R, 13D
|- style="height:2em"
!1932
|
|
|rowspan=5 {{Party shading/Republican}}|[[Herbert Hoover|Hoover]]/<br />[[Charles Curtis|Curtis]] {{small|(R)}} {{nay}}
|- style="height:2em"
!rowspan=2|1933
|rowspan=5 {{Party shading/Republican}}|[[Roy F. Corley]] {{small|(R)}}
|{{Party shading/Republican}}|[[Daniel J. Layton]] {{small|(R)}}
|
|
|
|rowspan=3 {{Party shading/Republican}}|9R, 8D
|rowspan=3 {{Party shading/Democratic}}|22D, 13R
|rowspan=3 {{Party shading/Democratic}}|[[Wilbur L. Adams]] {{small|(D)}}
|- style="height:2em"
|rowspan=6 {{Party shading/Republican}}|[[P. Warren Green]] {{small|(R)}}
|
|
|
|- style="height:2em"
!1934
|
|
|
|- style="height:2em"
!1935
|rowspan=2 {{Party shading/Republican}}|Warren T. Moore {{small|(R)}}
|rowspan=2 {{Party shading/Republican}}|James H. Hazel {{small|(R)}}
|rowspan=4 {{Party shading/Republican}}|James Postles Hammond {{small|(R)}}
|rowspan=2 {{Party shading/Republican}}|10R, 7D
|rowspan=2 {{Party shading/Republican}}|23R, 12D
|rowspan=2 {{Party shading/Republican}}|[[J. George Stewart]] {{small|(R)}}
|- style="height:2em"
!1936
|rowspan=4 {{Party shading/Democratic}}|[[Franklin D. Roosevelt|Roosevelt]]/<br />[[John Nance Garner|Garner]] {{small|(D)}} {{aye}}
|- style="height:2em"
!1937
|rowspan=4 {{Party shading/Democratic}}|[[Richard McMullen]] {{small|(D)}}
|rowspan=4 {{Party shading/Democratic}}|[[Edward W. Cooch]] {{small|(D)}}
|rowspan=2 {{Party shading/Democratic}}|Ernest C. Blackstone {{small|(D)}}
|rowspan=2 {{Party shading/Democratic}}|James W. Wise {{small|(D)}}
|rowspan=4 {{Party shading/Republican}}|11R, 6D
|rowspan=2 {{Party shading/Democratic}}|21D, 14R
|rowspan=6 {{Party shading/Democratic}}|[[James H. Hughes]] {{small|(D)}}
|rowspan=2 {{Party shading/Democratic}}|[[William F. Allen (Delaware politician)|William F. Allen]] {{small|(D)}}
|- style="height:2em"
!1938
|- style="height:2em"
!1939
|rowspan=4 {{Party shading/Republican}}|[[James R. Morford]] {{small|(R)}}
|rowspan=2 {{Party shading/Republican}}|Fagan H. Simonton {{small|(R)}}
|rowspan=2 {{Party shading/Republican}}|Benjamin I. Shaw {{small|(R)}}
|rowspan=12 {{Party shading/Republican}}|William J. Swain {{small|(R)}}
|rowspan=4 {{Party shading/Republican}}|20R, 15D
|rowspan=2 {{Party shading/Republican}}|[[George S. Williams]] {{small|(R)}}
|- style="height:2em"
!1940
|rowspan=4 {{Party shading/Democratic}}|[[Franklin D. Roosevelt|Roosevelt]]/<br />[[Henry A. Wallace|Wallace]] {{small|(D)}} {{aye}}
|- style="height:2em"
!1941
|rowspan=8 {{Party shading/Republican}}|[[Walter W. Bacon]] {{small|(R)}}
|rowspan=4 {{Party shading/Democratic}}|[[Isaac J. MacCollum]] {{small|(D)}}
|rowspan=2 {{Party shading/Democratic}}|Peter S. Collins {{small|(D)}}
|rowspan=2 {{Party shading/Democratic}}|Harrison M. Manning {{small|(D)}}
|rowspan=4 {{Party shading/Republican}}|10R, 7D
|rowspan=6 {{Party shading/Democratic}}|[[James M. Tunnell]] {{small|(D)}}
|rowspan=2 {{Party shading/Democratic}}|[[Philip A. Traynor]] {{small|(D)}}
|- style="height:2em"
!1942
|- style="height:2em"
!1943
|rowspan=4 {{Party shading/Republican}}|[[Clair J. Killoran]] {{small|(R)}}
|rowspan=2 {{Party shading/Republican}}|John S. Isaacs {{small|(R)}}
|rowspan=2 {{Party shading/Republican}}|Joseph M. Harrington {{small|(R)}}
|rowspan=2 {{Party shading/Republican}}|24R, 11D
|rowspan=6 {{Party shading/Republican}}|[[C. Douglass Buck]] {{small|(R)}}
|rowspan=2 {{Party shading/Republican}}|[[Earle D. Willey]] {{small|(R)}}
|- style="height:2em"
!1944
|rowspan=4 {{Party shading/Democratic}}|[[Franklin D. Roosevelt|Roosevelt]]/<br />[[Harry S. Truman|Truman]] {{small|(D)}} {{aye}}
|- style="height:2em"
!1945
|rowspan=4 {{Party shading/Democratic}}|[[Elbert N. Carvel]] {{small|(D)}}
|rowspan=2 {{Party shading/Democratic}}|Jesse S. Cooper Jr. {{small|(D)}}
|rowspan=2 {{Party shading/Democratic}}|Wilbur E. Jacobs {{small|(D)}}
|rowspan=4 {{Party shading/Republican}}|11R, 6D
|rowspan=2 {{Party shading/Republican}}|22R, 13D
|rowspan=2 {{Party shading/Democratic}}|Philip A. Traynor {{small|(D)}}
|- style="height:2em"
!1946
|- style="height:2em"
!1947
|rowspan=4 {{Party shading/Republican}}|[[Albert W. James]] {{small|(R)}}
|rowspan=2 {{Party shading/Republican}}|Benjamin F. Johnson {{small|(R)}}
|rowspan=2 {{Party shading/Republican}}|Benjamin I. Shaw {{small|(R)}}
|rowspan=2 {{Party shading/Republican}}|24R, 11D
|rowspan=25 {{Party shading/Republican}}|[[John J. Williams (politician)|John J. Williams]] {{small|(R)}}
|rowspan=6 {{Party shading/Republican}}|[[J. Caleb Boggs]] {{small|(R)}}
|- style="height:2em"
!1948
|rowspan=4 {{Party shading/Republican}}|[[Thomas E. Dewey|Dewey]]/<br />[[Earl Warren|Warren]] {{small|(R)}} {{nay}}
|- style="height:2em"
!1949
|rowspan=4 {{Party shading/Democratic}}|Elbert N. Carvel {{small|(D)}}
|rowspan=4 {{Party shading/Democratic}}|[[Alexis I. du Pont Bayard]] {{small|(D)}}
|rowspan=2 {{Party shading/Democratic}}|Willard D. Boyce {{small|(D)}}
|rowspan=2 {{Party shading/Democratic}}|James W. W. Baker {{small|(D)}}
|rowspan=2 {{Party shading/Republican}}|9R, 8D
|rowspan=2 {{Party shading/Republican}}|18R, 17D
|rowspan=13 {{Party shading/Democratic}}|[[J. Allen Frear Jr.]] {{small|(D)}}
|- style="height:2em"
!1950
|- style="height:2em"
!1951
|rowspan=4 {{Party shading/Republican}}|[[H. Albert Young]] {{small|(R)}}
|rowspan=2 {{Party shading/Republican}}|Ralph W. Emerson {{small|(R)}}
|rowspan=4 {{Party shading/Republican}}|G. Dan Enterline {{small|(R)}}
|rowspan=4 {{Party shading/Republican}}|William R. Murphy {{small|(R)}}
|rowspan=2 {{Party shading/Democratic}}|9D, 8R
|rowspan=2 {{Party shading/Republican}}|19R, 16D
|- style="height:2em"
!1952
|rowspan=9 {{Party shading/Republican}}|[[Dwight D. Eisenhower|Eisenhower]]/<br />[[Richard Nixon|Nixon]] {{small|(R)}} {{aye}}
|- style="height:2em"
!1953
|rowspan=9 {{Party shading/Republican}}|J. Caleb Boggs {{small|(R)}}
|rowspan=4 {{Party shading/Republican}}|[[John W. Rollins]] {{small|(R)}}
|rowspan=2 {{Party shading/Republican}}|Clarence Collins Jr. {{small|(R)}}
|rowspan=2 {{Party shading/Republican}}|10R, 7D
|rowspan=2 {{Party shading/Republican}}|18R, 17D
|rowspan=2 {{Party shading/Republican}}|[[Herbert Warburton]] {{small|(R)}}
|- style="height:2em"
!1954
|- style="height:2em"
!1955
|rowspan=4 {{Party shading/Democratic}}|[[Joseph D. Craven]] {{small|(D)}}
|rowspan=2 {{Party shading/Democratic}}|[[Howard H. Dickerson]] {{small|(D)}}
|rowspan=2 {{Party shading/Democratic}}|[[Clifford E. Hall]] {{small|(D)}}
|rowspan=9 {{Party shading/Democratic}}|[[Harry S. Smith (politician)|Harry S. Smith]] {{small|(D)}}
|rowspan=2 {{Party shading/Democratic}}|12D, 5R
|rowspan=2 {{Party shading/Democratic}}|27D, 8R
|rowspan=2 {{Party shading/Democratic}}|[[Harris McDowell]] {{small|(D)}}
|- style="height:2em"
!1956
|- style="height:2em"
!1957
|rowspan=5 {{Party shading/Republican}}|[[David P. Buckson]] {{small|(R)}}
|rowspan=2 {{Party shading/Republican}}|[[Vera Davis]] {{small|(R)}}
|rowspan=2 {{Party shading/Republican}}|Dale E. Wheatley {{small|(R)}}
|rowspan=2 {{Party shading/Democratic}}|13D, 4R
|rowspan=2 {{Party shading/Democratic}}|19D, 16R
|rowspan=2 {{Party shading/Republican}}|[[Hal Haskell]] {{small|(R)}}
|- style="height:2em"
!1958
|- style="height:2em"
!1959
|rowspan=5 {{Party shading/Republican}}|[[Januar D. Bove Jr.]] {{small|(R)}}
|rowspan=9 {{Party shading/Democratic}}|Belle Everett {{small|(D)}}
|rowspan=7 {{Party shading/Democratic}}|Ernest E. Killen {{small|(D)}}
|rowspan=5 {{Party shading/Democratic}}|11D, 6R
|rowspan=3 {{Party shading/Democratic}}|26D, 9R
|rowspan=9 {{Party shading/Democratic}}|[[Harris McDowell]] {{small|(D)}}
|- style="height:2em"
!rowspan=2|1960
|- style="height:2em"
|rowspan=4 {{Party shading/Democratic}}|[[John F. Kennedy|Kennedy]]/<br />[[Lyndon B. Johnson|Johnson]] {{small|(D)}} {{aye}}
|- style="height:2em"
!1961
|rowspan=4 {{Party shading/Democratic}}|[[Elbert N. Carvel]] {{small|(D)}}
|rowspan=4 {{Party shading/Democratic}}|[[Eugene Lammot]] {{small|(D)}}
|rowspan=2 {{Party shading/Democratic}}|20D, 15R
|rowspan=12 {{Party shading/Republican}}|[[J. Caleb Boggs]] {{small|(R)}}
|- style="height:2em"
!1962
|- style="height:2em"
!1963
|rowspan=8 {{Party shading/Republican}}|[[David P. Buckson]] {{small|(R)}}
|rowspan=14 {{Party shading/Republican}}|[[Robert Short (Delaware)|Robert Short]] {{small|(R)}}
|rowspan=2 {{Party shading/Democratic}}|10D, 7R
|rowspan=2 {{Party shading/Democratic}}|24D, 11R
|- style="height:2em"
!1964
|rowspan=4 {{Party shading/Democratic}}|[[Lyndon B. Johnson|Johnson]]/<br />[[Hubert Humphrey|Humphrey]] {{small|(D)}} {{aye}}
|- style="height:2em"
!1965
|rowspan=4 {{Party shading/Democratic}}|[[Charles L. Terry Jr.]] {{small|(D)}}
|rowspan=4 {{Party shading/Democratic}}|[[Sherman W. Tribbitt]] {{small|(D)}}
|rowspan=2 {{Party shading/Democratic}}|Charles F. Moore {{small|(D)}}
|rowspan=2 {{Party shading/Democratic}}|13D, 5R
|rowspan=2 {{Party shading/Democratic}}|30D, 5R
|- style="height:2em"
!1966
|- style="height:2em"
!1967
|rowspan=4 {{Party shading/Republican}}|Daniel Ross {{small|(R)}}
|rowspan=6 {{Party shading/Republican}}|[[George W. Cripps]] {{small|(R)}}
|rowspan=2 {{Party shading/Tie}}|9R, 9D
|rowspan=2 {{Party shading/Republican}}|23R, 12D
|rowspan=4 {{Party shading/Republican}}|[[William Roth]] {{small|(R)}}{{efn|Resigned December 31, 1970, to become a U.S. Senator.}}
|- style="height:2em"
!1968
|rowspan=8 {{Party shading/Republican}}|[[Richard Nixon|Nixon]]/<br />[[Spiro Agnew|Agnew]] {{small|(R)}} {{aye}}
|- style="height:2em"
!1969
|rowspan=4 {{Party shading/Republican}}|[[Russell W. Peterson]] {{small|(R)}}
|rowspan=8 {{Party shading/Republican}}|[[Eugene Bookhammer]] {{small|(R)}}
|rowspan=4 {{Party shading/Republican}}|13R, 6D
|rowspan=2 {{Party shading/Republican}}|26R, 13D
|- style="height:2em"
!1970
|- style="height:2em"
!1971
|rowspan=4 {{Party shading/Republican}}|[[W. Laird Stabler Jr.]] {{small|(R)}}
|rowspan=2 {{Party shading/Democratic}}|[[Emily Womach]] {{small|(D)}}
|rowspan=2 {{Party shading/Republican}}|23R, 16D
|rowspan=32 {{Party shading/Republican}}|[[William Roth]] {{small|(R)}}
|rowspan=6 {{Party shading/Republican}}|[[Pete du Pont]] {{small|(R)}}
|- style="height:2em"
!1972
|- style="height:2em"
!1973
|rowspan=4 {{Party shading/Democratic}}|[[Sherman W. Tribbitt]] {{small|(D)}}
|rowspan=4 {{Party shading/Republican}}|[[Mary Jornlin]] {{small|(R)}}
|rowspan=2 {{Party shading/Democratic}}|[[F. Earl McGinnes]] {{small|(D)}}
|rowspan=2 {{Party shading/Republican}}|11R, 10D
|rowspan=2 {{Party shading/Republican}}|21R, 20D
|rowspan=38 {{Party shading/Democratic}}|[[Joe Biden]] {{small|(D)}}{{efn|Resigned after being elected [[Vice President of the United States]]<ref name="Kaufman appointment" />}}
|- style="height:2em"
!1974
|- style="height:2em"
!1975
|rowspan=4 {{Party shading/Democratic}}|[[Richard R. Wier Jr.]] {{small|(D)}}
|rowspan=6 {{Party shading/Republican}}|[[Richard T. Collins]] {{small|(R)}}
|rowspan=6 {{Party shading/Democratic}}|13D, 8R
|rowspan=2 {{Party shading/Democratic}}|25D, 16R
|- style="height:2em"
!1976
|rowspan=4 {{Party shading/Democratic}}|[[Jimmy Carter|Carter]]/<br />[[Walter Mondale|Mondale]] {{small|(D)}} {{aye}}
|- style="height:2em"
!1977
|rowspan=8 {{Party shading/Republican}}|[[Pete du Pont]] {{small|(R)}}
|rowspan=4 {{Party shading/Democratic}}|[[James D. McGinnis]] {{small|(D)}}
|rowspan=6 {{Party shading/Democratic}}|[[Tom Carper]] {{small|(D)}}
|rowspan=8 {{Party shading/Republican}}|[[David H. Elliott]] {{small|(R)}}
|rowspan=2 {{Party shading/Democratic}}|26D, 15R
|rowspan=6 {{Party shading/Republican}}|[[Thomas B. Evans Jr.]] {{small|(R)}}
|- style="height:2em"
!1978
|- style="height:2em"
!1979
|rowspan=4 {{Party shading/Republican}}|[[Richard S. Gebelein]] {{small|(R)}}
|rowspan=2 {{Party shading/Democratic}}|21D, 20R
|- style="height:2em"
!1980
|rowspan=8 {{Party shading/Republican}}|[[Ronald Reagan|Reagan]]/<br />[[George H. W. Bush|Bush]] {{small|(R)}} {{aye}}
|- style="height:2em"
!1981
|rowspan=4 {{Party shading/Republican}}|[[Mike Castle]] {{small|(R)}}
|rowspan=2 {{Party shading/Republican}}|[[Thomas W. Spruance]] {{small|(R)}}
|rowspan=2 {{Party shading/Democratic}}|12D, 9R
|rowspan=2 {{Party shading/Republican}}|25R, 16D
|- style="height:2em"
!1982
|- style="height:2em"
!1983
|rowspan=14 {{Party shading/Democratic}}|[[Charles Oberly]] {{small|(D)}}
|rowspan=18 {{Party shading/Republican}}|[[Janet Rzewnicki]] {{small|(R)}}
|rowspan=7 {{Party shading/Democratic}}|[[Dennis Greenhouse]] {{small|(D)}}
|rowspan=9 {{Party shading/Democratic}}|13D, 8R
|rowspan=2 {{Party shading/Democratic}}|25D, 16R
|rowspan=12 {{Party shading/Democratic}}|[[Tom Carper]] {{small|(D)}}
|- style="height:2em"
!1984
|- style="height:2em"
!1985
|rowspan=10 {{Party shading/Republican}}|[[Mike Castle]] {{small|(R)}}
|rowspan=4 {{Party shading/Democratic}}|[[S. B. Woo]] {{small|(D)}}
|rowspan=10 {{Party shading/Democratic}}|[[David N. Levinson]] {{small|(D)}}
|rowspan=7 {{Party shading/Republican}}|22R, 19D
|- style="height:2em"
!1986
|- style="height:2em"
!1987
|- style="height:2em"
!1988
|rowspan=6 {{Party shading/Republican}}|[[George H. W. Bush|Bush]]/<br />[[Dan Quayle|Quayle]] {{small|(R)}} {{aye}}
|- style="height:2em"
!rowspan=2|1989
|rowspan=6 {{Party shading/Republican}}|[[Dale E. Wolf]] {{small|(R)}}
|- style="height:2em"
|rowspan=31 {{Party shading/Republican}}|[[Tom Wagner]] {{small|(R)}}
|- style="height:2em"
!1990
|- style="height:2em"
!1991
|rowspan=5 {{Party shading/Democratic}}|15D, 6R
|rowspan=3 {{Party shading/Republican}}|24R, 17D
|- style="height:2em"
!rowspan=2|1992
|- style="height:2em"
|rowspan=8 {{Party shading/Democratic}}|[[Bill Clinton|Clinton]]/<br />[[Al Gore|Gore]] {{small|(D)}} {{aye}}
|- style="height:2em"
!1993
|rowspan=8 {{Party shading/Democratic}}|[[Tom Carper]] {{small|(D)}}{{efn|Resigned office on January 3, 2001, to begin term in the U.S. Senate, and was succeeded as governor by Ruth Ann Minner for the remaining 17 days of his term.}}
|rowspan=8 {{Party shading/Democratic}}|[[Ruth Ann Minner]] {{small|(D)}}
|rowspan=12 {{Party shading/Republican}}|[[Donna Lee Williams]] {{small|(R)}}
|rowspan=2 {{Party shading/Republican}}|22R, 19D
|rowspan=18 {{Party shading/Republican}}|[[Mike Castle]] {{small|(R)}}
|- style="height:2em"
!1994
|- style="height:2em"
!1995
|rowspan=11 {{Party shading/Republican}}|[[M. Jane Brady]] {{small|(R)}}
|rowspan=2 {{Party shading/Democratic}}|12D, 9R
|rowspan=2 {{Party shading/Republican}}|27R, 14D
|- style="height:2em"
!1996
|- style="height:2em"
!1997
|rowspan=2 {{Party shading/Democratic}}|12D, 9R
|rowspan=2 {{party shading/Republican}}|23R, 18D
|- style="height:2em"
!1998
|- style="height:2em"
!1999
|rowspan=10 {{Party shading/Democratic}}|[[Jack Markell]] {{small|(D)}}
|rowspan=10 {{Party shading/Democratic}}|13D, 8R
|rowspan=4 {{Party shading/Republican}}|26R, 15D
|- style="height:2em"
!2000
|rowspan=4 {{Party shading/Democratic}}|[[Al Gore|Gore]]/<br />[[Joe Lieberman|Lieberman]] {{small|(D)}} {{nay}}
|- style="height:2em"
!2001
|rowspan=8 {{Party shading/Democratic}}|[[Ruth Ann Minner]] {{small|(D)}}
|rowspan=8 {{Party shading/Democratic}}|[[John Carney (Delaware politician)|John Carney]] {{small|(D)}}
|rowspan=25 {{Party shading/Democratic}}|[[Tom Carper]] {{small|(D)}}
|- style="height:2em"
!2002
|- style="height:2em"
!2003
|rowspan=2 {{Party shading/Republican}}|29R, 12D
|- style="height:2em"
!2004
|rowspan=4 {{Party shading/Democratic}}|[[John Kerry|Kerry]]/<br />[[John Edwards|Edwards]] {{small|(D)}} {{nay}}
|- style="height:2em"
!2005
|rowspan=4 {{Party shading/Democratic}}|[[Matthew Denn]] {{small|(D)}}
|rowspan=2 {{Party shading/Republican}}|26R, 15D
|- style="height:2em"
!2006
|{{Party shading/Democratic}}|[[Carl Danberg]] {{small|(D)}}
|- style="height:2em"
!2007
|rowspan=8 {{Party shading/Democratic}}|[[Beau Biden]] {{small|(D)}}<ref name="AG" /><ref name="Kaufman appointment" />
|rowspan=2 {{Party shading/Republican}}|23R, 18D
|- style="height:2em"
!2008
|rowspan=8 {{Party shading/Democratic}}|[[Barack Obama|Obama]]/<br />[[Joe Biden|Biden]] {{small|(D)}} {{aye}}
|- style="height:2em"
!2009
|rowspan=8 {{Party shading/Democratic}}|[[Jack Markell]] {{small|(D)}}
|rowspan=6 {{Party shading/Democratic}}|[[Matthew Denn]] {{small|(D)}}
|rowspan=2 {{Party shading/Democratic}}|[[Velda Jones-Potter]] {{small|(D)}}{{efn|name=app}}
|rowspan=8 {{Party shading/Democratic}}|[[Karen Weldin Stewart]] {{small|(D)}}
|{{Party shading/Democratic}}|16D, 5R
|rowspan=2 {{Party shading/Democratic}}|24D, 17R
|{{Party shading/Democratic}}|[[Ted Kaufman]]<ref name="Kaufman appointment">{{Cite web |last=Mahtesian |first=Charles |date=2010-01-25 |title=Beau Biden declines Senate bid |url=https://www.politico.com/story/2010/01/beau-biden-declines-senate-bid-031952 |access-date=March 28, 2025 |website=[[Politico]] |language=en}}</ref> {{small|(D)}}{{efn|Appointed to fill the vacancy created by Biden's resignation.<ref name="Kaufman appointment" />}}
|- style="height:2em"
!2010
|{{Party shading/Democratic}}|15D, 6R{{efn|A special election occurred after the death of Sen. [[Thurman Adams Jr.]] {{small|(D)}}, who was succeeded by Joseph W. Booth {{small|(R)}} after the 2009 session, flipping the seat from Democratic to Republican.<ref>http://www.newsworks.org/index.php/local/the-latest/2057-booth-wins-special-election {{Dead link|date=March 2022}}</ref>}}
|rowspan=17 {{Party shading/Democratic/current}}|[[Chris Coons]] {{small|(D)}}
|- style="height:2em"
!2011
|rowspan=4 {{Party shading/Democratic}}|[[Chipman Flowers Jr.]] {{small|(D)}}
|rowspan=2 {{Party shading/Democratic}}|14D, 7R
|rowspan=2 {{Party shading/Democratic}}|26D, 15R
|rowspan=6 {{Party shading/Democratic}}|[[John Carney (Delaware politician)|John Carney]] {{small|(D)}}
|- style="height:2em"
!2012
|- style="height:2em"
!2013
|rowspan=2 {{Party shading/Democratic}}|13D, 8R
|rowspan=2 {{Party shading/Democratic}}|27D, 14R
|- style="height:2em"
!2014
|- style="height:2em"
!2015
|rowspan=2 |''vacant''
|rowspan=4 {{Party shading/Democratic}}|[[Matthew Denn]] {{small|(D)}}
|rowspan=4 {{Party shading/Republican}}|[[Ken Simpler]] {{small|(R)}}
|rowspan=2 {{Party shading/Democratic}}|12D, 9R
|rowspan=4 {{Party shading/Democratic}}|25D, 16R
|- style="height:2em"
!2016
|rowspan=4 {{Party shading/Democratic}}|[[Hillary Clinton|Clinton]]/<br />[[Tim Kaine|Kaine]] {{small|(D)}} {{nay}}
|- style="height:2em"
!2017
| rowspan=9 {{Party shading/Democratic}} |[[John Carney (Delaware politician)|John Carney]] {{small|(D)}}
| rowspan=9 {{Party shading/Democratic}} |[[Bethany Hall-Long]] {{small|(D)}}
| rowspan=10 {{Party shading/Democratic/current}} |[[Trinidad Navarro]] {{small|(D)}}
| rowspan=2 {{Party shading/Democratic}} |11D, 10R
| rowspan=9 {{Party shading/Democratic}} |[[Lisa Blunt Rochester]] {{small|(D)}}
|- style="height:2em"
!2018
|- style="height:2em"
!2019
| rowspan=8 {{Party shading/Democratic/current}} |[[Kathy Jennings]] {{small|(D)}}
| rowspan=8 {{Party shading/Democratic/current}} |[[Colleen Davis]] {{small|(D)}}
| rowspan=4 {{Party shading/Democratic}} |[[Kathy McGuiness]] {{small|(D)}}{{efn|Resigned on October 19, 2022, after being convicted for corruption and conflict of interest.}}
| rowspan=2 {{Party shading/Democratic}} |12D, 9R
| rowspan=7 {{Party shading/Democratic}} |26D, 15R
|- style="height:2em"
!2020
| rowspan=5 {{Party shading/Democratic}} |[[Joe Biden|Biden]]/<br />[[Kamala Harris|Harris]] {{small|(D)}} {{Aye}}
|- style="height:2em"
!2021
| rowspan=3 {{Party shading/Democratic}} |14D, 7R
|- style="height:2em"
! rowspan=2 |2022
|- style="height:2em"
| {{Party shading/Democratic}} |[[Dennis Greenhouse]] {{small|(D)}}{{efn|name=app}}
|- style="height:2em"
!2023
| rowspan=3 {{Party shading/Democratic/current}} |[[Lydia York]] {{small|(D)}}
| rowspan=3 {{Party shading/Democratic/current}} |15D, 6R
|- style="height:2em"
!2024
| rowspan=2 {{Party shading/Democratic}} |[[Kamala Harris|Harris]]/<br />[[Tim Walz|Walz]] {{small|(D)}} {{Nay}}<ref name="2024 results" />
|- style="height:2em"
!2025
| rowspan=1 {{Party shading/Democratic/current}} |[[Matt Meyer]] {{small|(D)}}<ref name="2024 results" />
| rowspan=1 {{Party shading/Democratic/current}} |[[Kyle Evans Gay]] {{small|(D)}}
| rowspan=1 {{Party shading/Democratic/current}} |27D, 14R
| rowspan=1 {{Party shading/Democratic/current}} |[[Lisa Blunt Rochester]] {{small|(D)}}<ref name="2024 results" />
| rowspan=1 {{Party shading/Democratic/current}} |[[Sarah McBride]] {{small|(D)}}<ref name="2024 results" >{{Cite web|title=2024 Delaware Election Results |url=https://apnews.com/projects/election-results-2024/delaware/?r=0 |website=[[Associated Press]] |access-date=March 19, 2025}}</ref>
|}
{{United States political party shading key}}

== Notes ==
{{notelist}}

==References==
{{reflist}}

==See also==
*[[Delaware#Law and government|Law and government in Delaware]]
*[[Politics of Delaware]]
*[[Elections in Delaware]]

{{Political party strength in U.S. states}}

{{DEFAULTSORT:Political Party Strength In Delaware}}
[[Category:Politics of Delaware]]
[[Category:Government of Delaware]]
[[Category:Political party strength in the United States by state|Delaware]]