View source for Adelphi, Maryland

{{Use American English|date=January 2025}}
{{Use mdy dates|date=July 2023}}
{{Infobox settlement
|name                     = Adelphi, Maryland
|settlement_type          = [[Census-designated place]]
|nickname                 = 
|motto                    =

<!-- Images -->
|image_skyline            = Adelphi Mill 1.jpg{{!}}border
|imagesize                = 275px
|image_caption            = The [[Adelphi Mill]] in July 2007
|image_flag               = 
|image_seal               =

<!-- Maps -->
|image_map = Prince_George's_County_Maryland_Incorporated_and_Unincorporated_areas_Adelphi_Highlighted.svg
|mapsize                  = 250x200px
|map_caption              = Location of Adelphi, Maryland
|image_map1               = 
|mapsize1                 = 
|map_caption1             =

<!-- Location -->
| subdivision_type = Country
|subdivision_name         = {{nowrap|{{flagu|United States}}}}
|subdivision_type1        = [[U.S. state|State]]
|subdivision_name1        = {{flag|Maryland|size=23px}}
|subdivision_type2        = [[List of counties in Maryland|County]]
|subdivision_name2        = {{nowrap|{{flagicon image|Flag of Prince George's County, Maryland (1963–present).svg|size=23px}} [[Prince George's County, Maryland|Prince George's]]}}
|government_footnotes     = 
|government_type          = 
|leader_title             = 
|leader_name              = 
|leader_title1            = 
|leader_name1             = 
|established_title        = 
|established_date         =

<!-- Area -->
|unit_pref  = Imperial
|area_footnotes           = <ref name="CenPopGazetteer2020">{{cite web|title=2020 U.S. Gazetteer Files|url=https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2020_Gazetteer/2020_gaz_place_24.txt|publisher=United States Census Bureau|accessdate=April 26, 2022}}</ref>
|area_magnitude           = 
|area_total_km2           = 7.04
|area_land_km2            = 7.03
|area_water_km2           = 0.01
|area_total_sq_mi         = 2.72
|area_land_sq_mi          = 2.72
|area_water_sq_mi         = 0.00

<!-- Population -->
|population_as_of         = [[2020 United States census|2020]]
|population_footnotes     = 
|population_total         = 16823
|population_density_km2   = 2391.72
|population_density_sq_mi = 6194.04

<!-- General information -->
|timezone                 = [[North American Eastern Time Zone|Eastern (EST)]]
| utc_offset = &minus;5
|timezone_DST             = EDT
| utc_offset_DST = &minus;4
|elevation_footnotes      = 
|elevation_m              = 52
|elevation_ft             = 171
|coordinates              = {{coord|38|59|49|N|76|58|0|W|region:US-MD_type:city|display=inline,title}}
|postal_code_type         = [[ZIP Code]]s
|postal_code              = 20783, 20787
|area_codes                = [[Area codes 301 and 240|301, 240]]
|blank_name               = [[Federal Information Processing Standard|FIPS code]]
|blank_info               = 24-00400
|blank1_name              = [[Geographic Names Information System|GNIS]] feature ID
|blank1_info              = 0596997
|website                  = 
|footnotes                = 
|pop_est_as_of = 
|pop_est_footnotes = 
|population_est = 
}}

'''Adelphi''' is an [[unincorporated area]] and [[census-designated place]] in [[Prince George's County, Maryland|Prince George's County]], [[Maryland]], United States.<ref>{{gnis|596997}}</ref> Per the 2020 Census, the population was 16,823.<ref>{{Cite web|title=Adelphi CDP, Maryland|url=https://data.census.gov/cedsci/profile?g=1600000US2400400|website=[[United States Census Bureau]]|accessdate=March 13, 2022}}</ref> Adelphi includes the following subdivisions; Adelphi, Adelphi Park, Adelphi Hills, Adelphi Terrace, Adelphi Village, Buck Lodge, Chatham, Cool Spring Terrace, Hillandale Forest, Holly Hill Manor, Knollwood, Lewisdale, and White Oak Manor.

==History==
The unincorporated Adelphi community takes its name from the historic [[Adelphi Mill]], established in 1796 along the [[Northwest Branch Anacostia River|Northwest Branch]] of the [[Anacostia River]]. and continues to attract visitors and can be rented for special functions. During the 19th century, [[George Washington Riggs]] acquired much of the area northeast of [[Washington, D.C.]], as his Green Hill estate in the [[Chillum, Maryland|Chillum Manor]] district. That estate included present-day Adelphi. In the early 1920s, part of the area was acquired by [[Leander McCormick-Goodhart]] as part of his [[Langley Park, Maryland|Langley Park]] estate.<ref>"Adelphi Mill Is Reopened to the Public," ''The Washington Post and Times-Herald'', Dec 6, 1954, pg. 21.</ref> Labor organizer [[Mary Harris Jones|Mary Harris "Mother" Jones]] died in 1930, at the farm of Walter and Lillie May Burgess near Powder Mill and Riggs Roads in present-day Adelphi. A marker was erected by the [[Maryland State Highway Administration]] commemorating Mother Jones at her death site. Unlike its nearby neighbors [[Hyattsville, Maryland|Hyattsville]] and [[College Park, Maryland|College Park]], the area remained relatively undeveloped until immediately following [[World War II]]. At that time, subdivisions quickly developed.

To distinguish it from the other neighboring unincorporated communities of [[Lewisdale, Maryland|Lewisdale]] and [[Langley Park, Maryland|Langley Park]], the growing subdivisions banded together in the mid-1950s and adopted the name "Adelphi" to reflect their commitment to the preservation of the historic mill of the same name. A community focal point that originally developed in the late 1950s is the Adelphi Pool, a private pool in the Adelphi neighborhood, located next to George Washington Cemetery on Riggs Road.

Use of the Adelphi Pool requires paid membership or being accompanied by a member and paying a small fee. The Adelphi pool offers swimming lessons and also features swim teams which compete against each other. Two notable features of the Adelphi Pool are its long water slide and basketball hoop.

In 1971, the [[Harry Diamond Laboratories]] was established on {{convert|137|acre|km2}} in the northern part of Adelphi. That facility continues as the Adelphi Laboratory Center, [[Army Research Laboratory]] (ARL), the U.S. Army's corporate research laboratory.<ref name="gsec">{{cite web| url=http://www.globalsecurity.org/military/facility/adelphi.htm| title=Adelphi Laboratory Center |date=2008-04-15| work=Entry for Adelphi Laboratory Center [Harry Diamond Laboratories], US Army Research Laboratory (ARL)| publisher=Globalsecurity.org}}</ref> Other adjacent federal facilities include the [[National Archives at College Park]] and headquarters of the [[Food and Drug Administration]].

===Historic sites===
The following is a list of historic sites in Adelphi identified by the [[Maryland-National Capital Park and Planning Commission]]:<ref>[http://www.mncppc.org/county/historic_sites.htm M-NCPPC Illustrated Inventory of Historic Sites (Prince George's County, Maryland), 2006] {{Webarchive|url=https://web.archive.org/web/20080725020708/http://www.mncppc.org/county/historic_sites.htm |date=2008-07-25 }}.</ref>
{|class="wikitable sortable" style="width:98%"
! {{NRHP color}}|
! width = 25% {{NRHP color}}| '''Site name'''
! width = 8% class="unsortable" {{NRHP color}}| '''Image'''
! {{NRHP color}}|'''Location'''
! class="unsortable" {{NRHP color}}| '''M-NCPPC Inventory Number'''
! class="unsortable" {{NRHP color}}| '''Comment'''
|--
! {{NRHP color}} | <small>1</small>
| [[Adelphi Mill|Adelphi Mill and Storehouse]]
| [[File:Adelphi Mill 1.jpg|border|125px|center]]
| 8401 and 8402 Riggs Road
| 65-006
| <!-- Comment goes here -->
|--
! {{NRHP color}} | <small>2</small>
| [[Cool Spring Farm (Miller’s House)]]
| <!-- Image goes here -->
| 2201 Cool Spring Road
| 65-005
| <!-- Comment goes here -->
|--
! {{NRHP color}} | <small>3</small>
| [[Gallant House (Adelphi, Maryland)|Gallant House]]
| <!-- Image goes here -->
| 3124 Powder Mill Road
| 61-013
| <!-- Comment goes here -->
|}

==Geography==
Adelphi is located at {{coord|38|59|49|N|76|58|0|W|type:city}} (38.996860, &minus;76.966755).<ref name="GR1">{{cite web|url=https://www.census.gov/geographies/reference-files/time-series/geo/gazetteer-files.html|publisher=[[United States Census Bureau]]|access-date=2011-04-23|date=2011-02-12|title=US Gazetteer files: 2010, 2000, and 1990}}</ref>

According to the [[United States Census Bureau]], the Census Designated Place (CDP) has a total area of {{convert|7.1|sqkm|disp=flip}}, all land.<ref>{{Cite web|url=https://www.census.gov |title=Geographic Identifiers: 2010 Demographic Profile Data (G001): Adelphi CDP, Maryland |publisher=[[United States Census Bureau]] |access-date=December 14, 2011 }}</ref>

===Adjacent areas===
* [[Hillandale, Maryland|Hillandale]] (northwest)
* [[Beltsville, Maryland|Beltsville]] (north)
* [[Calverton, Maryland|Calverton]] (north)
* [[College Park, Maryland|College Park]] (southeast)
* [[Hyattsville, Maryland|Hyattsville]] (south)
* [[Lewisdale, Maryland|Lewisdale]] (southwest)
* [[Langley Park, Maryland|Langley Park]] (southwest)
* [[Silver Spring, Maryland|Silver Spring]] (west)

==Demographics==
{{US Census population
|2000= 14998
|2010= 15086
|2020= 16823
|align-fn=center
|footnote=U.S. Decennial Census<ref name="DecennialCensus">{{cite web|url=https://www.census.gov/programs-surveys/decennial-census/decade.html|title=Decennial Census of Population and Housing by Decades|publisher=[[US Census Bureau]]|access-date=}}</ref><br /> 2010<ref name=2010CensusP2/> 2020<ref name=2020CensusP2/>
}}

===2020 census===
{| class="wikitable" style="text-align:center;"
|+'''Adelphi CDP, Maryland – Racial and ethnic composition'''<br /><small>{{nobold|''Note: the US Census treats Hispanic/Latino as an ethnic category. This table excludes Latinos from the racial categories and assigns them to a separate category. Hispanics/Latinos may be of any race.''}}</small>
!Race / Ethnicity <small>(''NH = Non-Hispanic'')</small>
!Pop 2000<ref name=2000CensusP004>{{Cite web|title=P004: Hispanic or Latino, and Not Hispanic or Latino by Race – 2000: DEC Summary File 1 – Adelphi CDP, Maryland|url=https://data.census.gov/table?g=1600000US2400400&tid=DECENNIALSF12000.P004|website=[[United States Census Bureau]] |access-date= }}</ref>
!Pop 2010<ref name=2010CensusP2>{{Cite web|title=P2 Hispanic or Latino, and Not Hispanic or Latino by Race – 2010: DEC Redistricting Data (PL 94-171) - Adelphi CDP, Maryland|url=https://data.census.gov/cedsci/table?q=p2&g=1600000US2400400&tid=DECENNIALPL2010.P2|website=[[United States Census Bureau]]}}</ref>
!{{partial|Pop 2020}}<ref name=2020CensusP2>{{Cite web|title=P2 Hispanic or Latino, and Not Hispanic or Latino by Race – 2020: DEC Redistricting Data (PL 94-171) - Adelphi CDP, Maryland|url=https://data.census.gov/cedsci/table?q=p2&g=1600000US2400400&tid=DECENNIALPL2020.P2|website=[[United States Census Bureau]]}}</ref>
!% 2000
!% 2010
!{{partial|% 2020}}
|-
|[[Non-Hispanic or Latino whites|White]] alone (NH)
|3,229
|1,980
|style='background: #ffffe6; |1,571
|38.75%
|13.12%
|style='background: #ffffe6; |9.34%
|-
|[[Non-Hispanic or Latino African Americans|Black or African American]] alone (NH)
|5,812
|5,291
|style='background: #ffffe6; |4,953
|38.75%
|35.07%
|style='background: #ffffe6; |29.44%
|-
|[[Native Americans in the United States|Native American]] or [[Alaska Native]] alone (NH)
|28
|37
|style='background: #ffffe6; |36
|0.19%
|0.25%
|style='background: #ffffe6; |0.21%
|-
|[[Asian Americans|Asian]] alone (NH)
|1,481
|1,168
|style='background: #ffffe6; |1,367
|9.87%
|7.74%
|style='background: #ffffe6; |8.13%
|-
|[[Native Hawaiian]] or [[Pacific Islander Americans|Pacific Islander]] alone (NH)
|9
|5
|style='background: #ffffe6; |6
|0.19%
|0.03%
|style='background: #ffffe6; |0.04%
|-
|[[Race and ethnicity in the United States census|Other race]] alone (NH)
|80
|53
|style='background: #ffffe6; |91
|0.53%
|0.35%
|style='background: #ffffe6; |0.54%
|-
|[[Multiracial Americans|Mixed race or Multiracial]] (NH)
|499
|207
|style='background: #ffffe6; |336
|3.33%
|1.37%
|style='background: #ffffe6; |2.00%
|-
|[[Hispanic and Latino Americans|Hispanic or Latino]] (any race)
|3,860
|6,345
|style='background: #ffffe6; |8,463
|25.74%
|42.06%
|style='background: #ffffe6; |50.31%
|-
|'''Total'''
|'''14,998'''
|'''15,086'''
|style='background: #ffffe6; |'''16,823'''
|'''100.00%'''
|'''100.00%'''
|style='background: #ffffe6; |'''100.00%'''
|}

===2000 Census===
As of 2000, there were 14,998 people, 5,332 households, and 3,321 families that were reported to be living in Adelphi, Maryland. The population density was {{convert|5,067.9|PD/sqmi|PD/km2|sp=us|adj=off}}. There were 5,627 housing units at an average density of {{convert|1,901.4|/sqmi|/km2|sp=us|adj=off}}. The racial makeup of the CDP was quite diverse, including 29.48% [[White (U.S. Census)|White]], 39.83% [[African American (U.S. Census)|African American]], 0.28% [[Native American (U.S. Census)|Native American]], 9.95% [[Asian (U.S. Census)|Asian]], 0.06% [[Pacific Islander (U.S. Census)|Pacific Islander]], 15.04% from [[Race (United States Census)|other races]], and 5.36% from two or more races. [[Hispanic (U.S. Census)|Hispanic]] or [[Latino (U.S. Census)|Latino]] of any race were 25.74% of the population.

There were 5,332 households, out of which 30.6% had children under the age of 18 living with them, 42.5% were [[Marriage|married couples]] living together, 13.5% had a female householder with no husband present, and 37.7% were non-families. 27.5% of all households were made up of individuals, and 6.1% had someone living alone who was 65 years of age or older. The average household size was 2.77 and the average family size was 3.35.

In the CDP, the age distribution of the population included 22.7% under the age of 18, 13.0% from 18 to 24, 35.7% from 25 to 44, 19.1% from 45 to 64, and 9.5% who were 65 years of age or older. The median age was 32 years. For every 100 females, there were 98.1 males. For every 100 females age 18 and over, there were 96.6 males.

The median income for a household in the CDP was $45,827, and the median income for a family was $53,839. Males had a median income of $32,495 versus $31,932 for females. The [[per capita income]] for the CDP was $20,952. About 6.6% of families and 9.0% of the population were below the [[poverty line]], including 6.2% of those under age 18 and 7.4% of those age 65 or over.

==Government and infrastructure==
The [[Prince George's County Police Department]] serves Adelphi through District 1,<ref>{{cite news|author=Rucker, Philip|author2=Eric Rich|author3=Allison Klein|url=https://www.washingtonpost.com/wp-dyn/content/article/2006/07/01/AR2006070100392.html|title=Three Dead After Gang-Related Shooting|newspaper=[[The Washington Post]]|date=2006-07-01|access-date=2018-09-19|quote=In District 1, the police district that includes Adelphi, Langley Park and other communities,[...]}}</ref> with its station in [[Hyattsville, Maryland|Hyattsville]].<ref>"[https://www.princegeorgescountymd.gov/Facilities/Facility/Details/District-1-Station-Hyattsville-1 District 1 Station - Hyattsville] {{Webarchive|url=https://web.archive.org/web/20180909112749/https://www.princegeorgescountymd.gov/Facilities/Facility/Details/District-1-Station-Hyattsville-1 |date=September 9, 2018 }}. [[Prince George's County Police Department]]. Retrieved on September 9, 2018. [https://www.princegeorgescountymd.gov/DocumentCenter/View/2650/District-1-Beat-Map--PDF?bidId= Beat map] {{Webarchive|url=https://web.archive.org/web/20180909055502/https://www.princegeorgescountymd.gov/DocumentCenter/View/2650/District-1-Beat-Map--PDF?bidId= |date=September 9, 2018 }}.</ref>

The [[Chillum, Maryland|Chillum]]-Adelphi Volunteer Fire Department (CAVFD) serves Adelphi. The station is in Langley Park CDP and has an Adelphi postal address.<ref name=LPmap>"[http://www2.census.gov/geo/maps/dc10map/GUBlock/st24_md/place/p2445525_langley_park/DC10BLK_P2445525_001.pdf 2010 Census – Census Block Map: Langley Park CDP, MD]." [[U.S. Census Bureau]]. Retrieved on January 31, 2018.</ref><ref>"[http://34box.com/where-we-are/ Where We Are]." Chillum-Adelphi Volunteer Fire Department. Retrieved on September 9, 2018. "The Chillum-Adelphi Volunteer Fire Department Prince George’s County, MD – Co. 34 7833 Riggs Rd, Adelphi, MD 20783"</ref> In March 1951 and June 8, 1951 the CAVFD was established and chartered, respectively. From November and March 1953 the fire station on Riggs Road was constructed; the County Volunteer Firemen's Association designated it Station No. 34. Portions of Station No. 34 were rebuilt in the early 1960s, and it was rededicated on November 16, 1963. In 1962 the CAVFD began building a substation, No. 44, which was dedicated on November 16, 1963, but in 1992 it sold the substation to the county government.<ref>"[http://34box.com/department-history/ Department History]." Chillum-Adelphi Volunteer Fire Department. Retrieved on September 9, 2018.</ref>

The [[University System of Maryland]] has an office in College Park,<ref>{{cite web|url=https://www.roads.maryland.gov/Town_Gridmaps/TownMap_037_CollegePark.pdf|title=College Park Route Number Map|publisher=[[Maryland Department of Transportation]]|access-date=2024-02-07|quote=U of MD Central Admin.}}</ref> which has an Adelphi postal address and is called the "Adelphi Office".<ref name=USMaddresses>{{cite web|url=https://www.usmd.edu/usm/|title=USM Office|publisher=University System of Maryland|access-date=2024-02-05|quote=USM Headquarters 701 E. Pratt St. Baltimore, MD 21202 Adelphi Office/Mailing Address for All USM Offices 3300 Metzerott Road Adelphi, MD 20783-1690}} - Annapolis and Columbia are stated as office locations. The "Adelphi" office is actually in College Park, [https://www.roads.maryland.gov/Town_Gridmaps/TownMap_037_CollegePark.pdf as indicated here].</ref> Formerly it was the headquarters of the entire system.<ref>{{cite web|url=http://www.usmd.edu/usm/|archive-url=https://web.archive.org/web/20060618121024/http://www.usmd.edu/usm/|title=USM Office|publisher=University System of Maryland|archive-date=2006-06-18|access-date=2024-02-05}}<br />"[http://www.usmd.edu/contact/ Contact/Visit Us]" ([https://web.archive.org/web/20060618121009/http://www.usmd.edu/contact/ Archive]). University System of Maryland. Retrieved on September 18, 2012. "3300 Metzerott Road Adelphi, MD 20783"&nbsp;– See also [http://www.usmd.edu/usm/directions Directions to USM Office] ([https://web.archive.org/web/20060618120930/http://www.usmd.edu/usm/directions Archive])</ref>

==Education==
Adelphi is the home of the [[University of Maryland Global Campus]], and the community is located near the [[University of Maryland, College Park|University of Maryland]] main campus in [[College Park, Maryland|College Park]].

Adelphi is served by the [[Prince George's County Public Schools]] system.<ref>"[https://www2.census.gov/geo/maps/dc10map/GUBlock/st24_md/place/p2400400_adelphi/DC10BLK_P2400400_001.pdf 2010 Census – Census Block Map: Adelphi CDP, MD]." [[U.S. Census Bureau]]. Retrieved on January 31, 2018.</ref> In 2000, a new elementary school opened in the community dedicated to labor organizer [[Mary Harris Jones|Mary Harris "Mother" Jones]].<ref>{{cite web |title=Who is "Mother Jones"? |url=https://www.pgcps.org/Mary-Harris-Mother-Jones/Who-is-Mother-Jones-/ |website=Mary Harris Mother Jones Elementary School |access-date=16 June 2019}}</ref>

Elementary schools in Adelphi:<ref name=ESmap>"[http://gis.pgcps.org/mapgallery/Maps/Boundaries%20-%20Elementary.pdf Neighborhood Elementary Schools and Boundaries School Year 2017-2018]." [[Prince George's County Public Schools]]. Retrieved on January 31, 2018.</ref>
* Adelphi Elementary School<ref>{{Cite web |title=Adelphi |url=http://www1.pgcps.org/adelphi |website=www1.pgcps.org}}</ref>
* Cherokee Lane Elementary School<ref>{{Cite web |title=Cherokee Lane |url=http://www1.pgcps.org/cherokeelane |website=www1.pgcps.org |access-date=November 2, 2008 |archive-date=November 2, 2008 |archive-url=https://web.archive.org/web/20081102083244/http://www1.pgcps.org/cherokeelane/ |url-status=dead }}</ref>
* Cool Spring Elementary School]<ref>{{Cite web |title=Coolspring |url=http://www1.pgcps.org/coolspring |website=www1.pgcps.org}}</ref>
* Mary Harris "Mother" Jones Elementary School<ref>{{Cite web |url=http://www1.pgcps.org/maryharrismotherjones/ |title=Archived copy |access-date=March 31, 2021 |archive-date=July 19, 2013 |archive-url=https://web.archive.org/web/20130719081351/http://www1.pgcps.org/maryharrismotherjones/ |url-status=bot: unknown }}</ref>
A southeastern section is zoned to University Park Elementary School in [[University Park, Maryland|University Park]].<ref name=ESmap/>

Two middle schools in Adelphi, Buck Lodge Middle School and [[Sonia Sotomayor]] Middle School, take up most of the CDP.<ref name=MSzonesret2024>{{cite web|url=https://gis.pgcps.org:443/mapgallery/Maps/Boundaries%20-%20Middle.pdf|title=Neighborhood Middle Schools and Boundaries School Year 2023-2024|publisher=[[Prince George's County Public Schools]]|access-date=2024-09-28}}</ref> Sotomayor Middle opened in 2023.<ref>{{cite web|last=Kennedy|first=Mike|url=https://www.asumag.com/planning-design/new-construction/article/21273889/prince-georges-county-maryland-district-celebrates-opening-of-5-middle-schools|title=Prince George's County (Maryland) district celebrates opening of 5 middle schools|work=[[American School and University]]|date=2023-09-18|access-date=2024-09-28}}</ref> Most residents are zoned to [[High Point High School]] in [[Beltsville, Maryland|Beltsville]].<ref name=HSzonesret2024>"[https://gis.pgcps.org/mapgallery/Maps/Boundaries%20-%20High.pdf Neighborhood High Schools and Boundaries School Year 2023-2024]." [[Prince George's County Public Schools]]. Retrieved on September 28, 2024.</ref> A southeastern section is zoned to Hyattsville Middle School and [[Northwestern High School (Hyattsville, Maryland)|Northwestern High School]] in [[Hyattsville, Maryland|Hyattsville]].<ref name=MSzonesret2024/><ref name=HSzonesret2024/>

==Notable people==
*[[John Fahey (musician)|John Fahey]]— Recorded the first Tacoma Records album at the St. Michaels and All Angels Church
*[[Fred Funk]] - professional golfer.
*[[Roy Hibbert]] - [[NBA]] player for the [[Indiana Pacers]]
*[[Mary Harris Jones]] (1837-1930) - Labor organizer known as "Mother" Jones
*[[Hugh V. Perkins]] (1918-1988) - educator, author, and professor of Education, [[University of Maryland - College Park]].

==See also==
{{Portal|Maryland}}
*[[Avenel-Hillandale, Maryland|Avenel-Hillandale]], name of a census-designated place that was part of Adelphi in 1970.

==References==
{{reflist}}

==External links==
{{Commons category}}
* [http://www.lockley.net/CoolInfo.shtml Cool Spring Terrace Civic Association]
* [http://www.adelphipool.org/ Adelphi Pool]
* [https://web.archive.org/web/20080927094443/http://www.34box.com/index.php Chillum-Adelphi Volunteer Fire Department]
* [http://www.arl.army.mil History of the Army Research Laboratory]
* [https://www.flickr.com/photos/saptel/sets/72157602372485589/ Mother Jones Plaque in Adelphi, MD]
* [https://web.archive.org/web/20081029091403/http://www.mdp.state.md.us/MSDC/census/cen2000/maps/PLC00/prinplc.pdf A scalable PDF map of Prince George's County, MD, showing the boundaries of the Adelphi Census Designated Place and other CDPs and Census Incorporated Places in the county -- from the Maryland Department of Planning web site]

{{Authority control}}

{{Prince George's County, Maryland}}

[[Category:Adelphi, Maryland| ]]
[[Category:Populated places established in 1796]]
[[Category:Census-designated places in Prince George's County, Maryland]]
[[Category:Census-designated places in Maryland]]
[[Category:1796 establishments in Maryland]]
[[Category:Neighborhoods of Silver Spring, Maryland]]