| County
|
FIPS Code [5]
|
County seat [6]
|
Est. [6][7]
|
Formed from[2]
|
Named for[3]
|
Density (Pop./mi2)
|
Pop. (2024) [8]
|
Area [6]
|
Map
|
| Albany County
|
001
|
Albany |
Template:Dts |
One of 12 original counties created in the New York colony |
James II of England (James VII of Scotland) (1633–1701), who was Duke of York (English title) and Duke of Albany (Scottish title) before becoming King of England, Ireland, and Scotland. |
600.31
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Albany County
|
| Allegany County
|
003
|
Belmont |
Template:Dts |
Genesee County |
A variant spelling of the Allegheny River |
45.74
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Allegany County
|
| Bronx County
|
005
|
none (sui generis) |
Template:Dts[9] |
New York County |
The Bronx River |
24,111.51
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Bronx County
|
| Broome County
|
007
|
Binghamton |
Template:Dts |
Tioga County |
John Broome (1738–1810), fourth Lieutenant Governor of New York |
274.68
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Broome County
|
| Cattaraugus County
|
009
|
Little Valley |
Template:Dts |
Genesee County |
A word from an uncertain Iroquoian language meaning "bad smelling banks", referring to the odor of natural gas which leaked from Cattaraugus Creek |
57.61
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Cattaraugus County
|
| Cayuga County
|
011
|
Auburn |
Template:Dts |
Onondaga County |
The Cayuga tribe of Native Americans |
86.30
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Cayuga County
|
| Chautauqua County
|
013
|
Mayville |
Template:Dts |
Genesee County |
Loanword from the Erie language describing Chautauqua Lake; language now lost and cannot be translated |
82.74
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Chautauqua County
|
| Chemung County
|
015
|
Elmira |
Template:Dts |
Tioga County |
A Lenape word meaning "big horn", which was the name of a local Native American village |
197.45
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Chemung County
|
| Chenango County
|
017
|
Norwich |
Template:Dts |
Tioga County and Herkimer County |
An Onondaga word meaning "large bull-thistle" |
50.93
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Chenango County
|
| Clinton County
|
019
|
Plattsburgh |
Template:Dts |
Washington County |
George Clinton (1739–1812), fourth Vice President of the United States and first and third Governor of New York |
69.65
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Clinton County
|
| Columbia County
|
021
|
Hudson |
Template:Dts |
Albany County |
Christopher Columbus (1451–1506), the European explorer |
93.05
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Columbia County
|
| Cortland County
|
023
|
Cortland |
Template:Dts |
Onondaga County |
Pierre Van Cortlandt (1721–1814), first Lieutenant Governor of New York |
91.52
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Cortland County
|
| Delaware County
|
025
|
Delhi |
Template:Dts |
Otsego County and Ulster County |
Thomas West, 3rd Baron De La Warr (1577–1618), an early colonial leader in Virginia. Name applied to the bay, river, and Lenape Native Americans |
30.10
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Delaware County
|
| Dutchess County
|
027
|
Poughkeepsie |
Template:Dts |
One of 12 original counties created in the New York colony |
Mary of Modena (1658–1718), Duchess of York and wife of King James II of England |
363.59
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Dutchess County
|
| Erie County
|
029
|
Buffalo |
Template:Dts |
Niagara County |
The Erie tribe of Native Americans |
774.74
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Erie County
|
| Essex County
|
031
|
Elizabethtown |
Template:Dts |
Clinton County |
The county of Essex in England |
19.18
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Essex County
|
| Franklin County
|
033
|
Malone |
Template:Dts |
Clinton County |
Benjamin Franklin (1706–1790), the early American printer, scientist, and statesman |
27.75
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Franklin County
|
| Fulton County
|
035
|
Johnstown |
Template:Dts |
Montgomery County |
Robert Fulton (1765–1815), inventor of the steamship |
97.70
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Fulton County
|
| Genesee County
|
037
|
Batavia |
Template:Dts |
Ontario County and land acquired in the Holland Purchase |
A Seneca phrase meaning "good valley" |
116.37
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Genesee County
|
| Greene County
|
039
|
Catskill |
Template:Dts |
Albany County and Ulster County |
Nathanael Greene (1742–1786), the American Revolutionary War general |
71.28
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Greene County
|
| Hamilton County
|
041
|
Lake Pleasant |
Template:Dts |
Montgomery County |
Alexander Hamilton (1755–1804), the early American political theorist and first Secretary of the Treasury |
2.81
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Hamilton County
|
| Herkimer County
|
043
|
Herkimer |
Template:Dts |
Montgomery County |
Nicholas Herkimer (1728–1777), the American Revolutionary War general |
40.87
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Herkimer County
|
| Jefferson County
|
045
|
Watertown |
Template:Dts |
Oneida County |
Thomas Jefferson (1743–1826), the early American statesman, author of the Declaration of Independence, and third President of the United States |
60.93
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Jefferson County
|
| Kings County
|
047
|
none (sui generis) |
Template:Dts |
One of 12 original counties created in the New York colony |
King Charles II of England (1630–1685) |
27,013.74
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Kings County
|
| Lewis County
|
049
|
Lowville |
Template:Dts |
Oneida County |
Morgan Lewis (1754–1844), the fourth Governor of New York |
20.60
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Lewis County
|
| Livingston County
|
051
|
Geneseo |
Template:Dts |
Genesee County and Ontario County |
Robert Livingston (1746–1813), the early American statesman and New York delegate to the Continental Congress |
96.19
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Livingston County
|
| Madison County
|
053
|
Wampsville |
Template:Dts |
Chenango County |
James Madison (1751–1836), the early American statesman, principal author of the Constitution of the United States, and fourth President of the United States |
101.32
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Madison County
|
| Monroe County
|
055
|
Rochester |
Template:Dts |
Genesee County and Ontario County |
James Monroe (1758–1831), the early American statesman and fifth President of the United States |
550.66
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Monroe County
|
| Montgomery County
|
057
|
Fonda |
Template:Dts |
Albany County |
Originally Tryon County after colonial governor William Tryon (1729–1788), renamed after the American Revolutionary War general Richard Montgomery (1738–1775) in 1784 |
121.09
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Montgomery County
|
| Nassau County
|
059
|
Mineola |
Template:Dts |
Queens County |
The Princes of Orange-Nassau ruled the Netherlands when Long Island was a Dutch colony |
3,073.81
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Nassau County
|
| New York County
|
061
|
none (sui generis) |
Template:Dts |
One of 12 original counties created in the New York colony |
King James II of England (1633–1701), who was Duke of York and Albany before he ascended the throne of England, Duke of York being his English title |
49,175.72
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting New York County
|
| Niagara County
|
063
|
Lockport |
Template:Dts |
Genesee County |
The Iroquoian name of a tribe within the Neutral Nation, the exact translation of which remains disputed |
183.83
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Niagara County
|
| Oneida County
|
065
|
Utica |
Template:Dts |
Herkimer County |
The Oneida tribe of Native Americans |
188.25
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Oneida County
|
| Onondaga County
|
067
|
Syracuse |
Template:Dts |
Herkimer County |
The Onondaga tribe of Native Americans |
582.89
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Onondaga County
|
| Ontario County
|
069
|
Canandaigua |
Template:Dts |
Land acquired in the Phelps and Gorham Purchase |
An Iroquoian word meaning "beautiful lake" |
170.71
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Ontario County
|
| Orange County
|
071
|
Goshen |
Template:Dts |
One of 12 original counties created in the New York colony |
William of Orange-Nassau (1650–1702), who became King William III of England |
490.78
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Orange County
|
| Orleans County
|
073
|
Albion |
Template:Dts |
Genesee County |
The French Royal House of Orléans |
48.58
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Orleans County
|
| Oswego County
|
075
|
Oswego |
Template:Dts |
Oneida County and Onondaga County |
The Oswego River, from an Iroquoian word meaning "the outpouring", referring to the mouth of the river |
90.17
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Oswego County
|
| Otsego County
|
077
|
Cooperstown |
Template:Dts |
Montgomery County |
A Native American word meaning "place of the rock" |
60.34
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Otsego County
|
| Putnam County
|
079
|
Carmel Hamlet |
Template:Dts |
Dutchess County |
Israel Putnam (1718–1790), an American Revolutionary War general |
400.04
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Putnam County
|
| Queens County
|
081
|
none (sui generis) |
Template:Dts |
One of 12 original counties created in the New York colony |
Catherine of Braganza (1638–1705), Queen of England and wife of King Charles II of England |
12,995.52
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Queens County
|
| Rensselaer County
|
083
|
Troy |
Template:Dts |
Albany County |
In honor of the family of Kiliaen van Rensselaer (before 1596 – after 1643), the early landholder in the Dutch New Netherland colony |
241.73
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Rensselaer County
|
| Richmond County
|
085
|
none (sui generis) |
Template:Dts |
One of 12 original counties created in the New York colony |
Charles Lennox, 1st Duke of Richmond (1672–1723), the illegitimate son of King Charles II of England |
4,860.60
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Richmond County
|
| Rockland County
|
087
|
New City |
Template:Dts |
Orange County |
Early settlers' description of terrain as "rocky land" |
1,749.47
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Rockland County
|
| St. Lawrence County
|
089
|
Canton |
Template:Dts |
Clinton County, Herkimer County, and Montgomery County |
The St Lawrence River, which forms the northern border of the county and New York State |
37.65
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting St. Lawrence County
|
| Saratoga County
|
091
|
Ballston Spa |
Template:Dts |
Albany County |
A corruption of a Native American word meaning "the hill beside the river" |
284.79
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Saratoga County
|
| Schenectady County
|
093
|
Schenectady |
Template:Dts |
Albany County |
A Mohawk word meaning "on the other side of the pine lands" |
772.67
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Schenectady County
|
| Schoharie County
|
095
|
Schoharie |
Template:Dts |
Albany County and Otsego County |
A Mohawk word meaning "floating driftwood" |
48.16
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Schoharie County
|
| Schuyler County
|
097
|
Watkins Glen |
Template:Dts |
Chemung County, Steuben County, and Tompkins County |
Philip Schuyler (1733–1804), the American Revolutionary War general and Senator from New York |
50.06
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Schuyler County
|
| Seneca County
|
099
|
Waterloo |
Template:Dts |
Cayuga County |
The Seneca tribe of Native Americans |
100.46
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Seneca County
|
| Steuben County
|
101
|
Bath |
Template:Dts |
Ontario County |
Friedrich Wilhelm von Steuben (1730–1794), the Prussian general who assisted the Continental Army during the American Revolutionary War |
65.54
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Steuben County
|
| Suffolk County
|
103
|
Riverhead |
Template:Dts |
One of 12 original counties created in the New York colony |
The county of Suffolk in England |
647.24
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Suffolk County
|
| Sullivan County
|
105
|
Monticello |
Template:Dts |
Ulster County |
John Sullivan (1740–1795), an American Revolutionary War general |
80.69
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Sullivan County
|
| Tioga County
|
107
|
Owego |
Template:Dts |
Montgomery County |
A Native American word meaning "at the forks", describing a meeting place |
90.96
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Tioga County
|
| Tompkins County
|
109
|
Ithaca |
Template:Dts |
Cayuga County and Seneca County |
Daniel D. Tompkins (1774–1825), the 6th Vice President of the United States |
221.85
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Tompkins County
|
| Ulster County
|
111
|
Kingston |
Template:Dts |
One of 12 original counties created in the New York colony |
The Irish province of Ulster, then an earldom of the Duke of York, later King James II of England |
157.60
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Ulster County
|
| Warren County
|
113
|
Queensbury |
Template:Dts |
Washington County |
Joseph Warren (1741–1775), the early American patriot and American Revolutionary War general |
75.04
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Warren County
|
| Washington County
|
115
|
Fort Edward |
Template:Dts |
Albany County |
Originally Charlotte County, renamed in 1784 after George Washington (1732–1799), the American Revolutionary War general and first President of the United States |
70.73
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Washington County
|
| Wayne County
|
117
|
Lyons |
Template:Dts |
Ontario County and Seneca County |
General Anthony Wayne (1745–1796), the American Revolutionary War general |
65.58
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Wayne County
|
| Westchester County
|
119
|
White Plains |
Template:Dts |
One of 12 original counties created in the New York colony |
The city of Chester in England |
2,012.89
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Westchester County
|
| Wyoming County
|
121
|
Warsaw |
Template:Dts |
Genesee County |
A modification of a word from the Lenape language meaning "broad bottom lands" |
66.42
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Wyoming County
|
| Yates County
|
123
|
Penn Yan |
Template:Dts |
Ontario County and Steuben County |
Joseph C. Yates (1768–1837), eighth Governor of New York |
64.86
|
Template:Nts
|
Template:Nts sq mi (Template:Nts km2) |
State map highlighting Yates County
|