Census-designated place · Maryland
Adelphi, Maryland
Adelphi, census-designated place, in Prince George's County, Maryland. Adelphi had 17,395 people in the ACS 2020-2024 5-year estimates (±1,462). GEOID 2400400.
Residents, 2020-2024
17,395
±1,462 (90% margin)
2020 Census count: 16,823
Median household income
$82,137
±$8,062 (90% margin)
Maryland: $103,678
Median home value
$425,200
±$28,703 (90% margin)
Maryland: $419,900
Median gross rent
$1,804
±$70 (90% margin)
Maryland: $1,705
Where is Adelphi and what county is it in?
Adelphi is a census-designated place: an unincorporated community the Census Bureau draws for counting, with no city government of its own, in Prince George's County, Maryland. It covers 2.7 square miles of land, 6,185 residents per square mile in 2020.
Adelphi is in the Washington-Arlington-Alexandria, DC-VA-MD-WV metropolitan statistical area, which takes in 23 counties (Census Bureau delineation, July 2023).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Adelphi, and is it growing?
The 2020-2024 American Community Survey puts Adelphi's population at 17,395 (±1,462). The 2020 Census counted 16,823 residents.
The Census Bureau publishes yearly population estimates for incorporated places only; Adelphi is a census-designated place, so its figures come from the ACS and the 2020 Census.
| Measure | Adelphi | Prince George's County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 17,395 ±1,462 | 959,754 | no clear change |
| Households | 5,202 ±361 | 347,744 | no clear change |
| Average household size | 3.30 ±0.17 | 2.70 | no clear change |
| Housing units | 5,615 ±348 | 365,506 | +382 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); Census PEP Vintage 2025 (SUB-EST2025, CO-EST2025); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Adelphi?
The median resident of Adelphi is 33.9 years old; 23.7% are under 18 and 10.5% are 65 or older. The largest group is Hispanic or Latino residents (of any race) at 54.7%, then non-Hispanic Black residents at 24.4%. 56.4% of residents were born outside the United States.
| Measure | Adelphi | Prince George's County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 33.9 ±3.0 | 38.5 | no clear change |
| Under 18 years | 23.7% ±2.9 pts | 22.1% | – |
| 65 years and over | 10.5% ±2.2 pts | 14.9% | – |
| Male | 50.3% ±2.6 pts | 48.4% | – |
| Hispanic or Latino (any race) | 54.7% ±7.4 pts | 22.5% | no clear change |
| White alone, not Hispanic | 9.7% ±3.3 pts | 10.8% | no clear change |
| Black or African American alone, not Hispanic | 24.4% ±5.3 pts | 58.2% | −10.1 pts |
| Asian alone, not Hispanic | 10.0% ±3.1 pts | 3.9% | +4.0 pts |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±0.2 pts | 0.1% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±0.2 pts | 0.0% | – |
| Two or more races, not Hispanic | 1.2% ±0.5 pts | 3.8% | – |
| Some other race alone, not Hispanic | 0.0% ±0.2 pts | 0.7% | – |
| Born outside the United States | 56.4% ±3.9 pts | 25.3% | no clear change |
| Speak a language other than English at home (age 5+) | 75.1% ±4.6 pts | 30.7% | – |
| Civilian veterans (age 18+) | 2.9% ±1.2 pts | 6.8% | – |
| With a disability | 8.4% ±2.6 pts | 10.5% | – |
| No health insurance coverage | 28.7% ±4.7 pts | 11.4% | +8.4 pts |
| High school graduate or higher (age 25+) | 71.7% ±4.1 pts | 86.6% | – |
| Bachelor's degree or higher (age 25+) | 30.0% ±4.7 pts | 36.7% | no clear change |
| Graduate or professional degree (age 25+) | 15.2% ±2.8 pts | 16.4% | – |
| Lived in the same house a year earlier | 88.4% ±2.9 pts | 88.4% | – |
| Moved from another state in the past year | 2.6% ±1.2 pts | 2.9% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Adelphi earn?
Half of Adelphi's 5,202 households earn less than $82,137 a year (±$8,062), against $101,798 in Prince George's County and $103,678 in Maryland. In 2015-2019 it was $92,607 in 2024 dollars; the margins of error cannot tell the two periods apart. 16.2% of residents live below the poverty line.
| Measure | Adelphi | Prince George's County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $82,137 ±$8,062 | $101,798 | no clear change |
| Mean household income | $117,389 ±$9,728 | $125,138 | – |
| Per capita income | $35,969 ±$3,318 | $46,366 | no clear change |
| People below the poverty line | 16.2% ±4.5 pts | 10.8% | no clear change |
| Children under 18 below the poverty line | 26.2% ±10.1 pts | 14.6% | no clear change |
| Households receiving SNAP | 11.6% ±4.8 pts | 12.2% | – |
| Households with a computer | 99.5% ±0.4 pts | 97.5% | – |
| Households with a broadband subscription | 92.4% ±2.6 pts | 93.8% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Adelphi?
Owners occupy 41.8% of Adelphi's occupied homes and renters 58.2%. The median owner-occupied home is valued at $425,200 by its owner (±$28,703). The median renter pays $1,804 a month including utilities, and 47.5% of renters pay 35% or more of their income on rent.
| Measure | Adelphi | Prince George's County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $425,200 ±$28,703 | $426,000 | +$39,131 |
| Median gross rent | $1,804 ±$70 | $1,799 | no clear change |
| Renters paying 35% or more of income on rent | 47.5% ±9.0 pts | 43.7% | no clear change |
| Median monthly owner costs, with a mortgage | $2,357 ±$184 | $2,456 | – |
| Owner-occupied homes | 41.8% ±4.9 pts | 62.3% | no clear change |
| Renter-occupied homes | 58.2% ±4.9 pts | 37.7% | – |
| Housing units | 5,615 ±348 | 365,506 | +382 |
| Homeowner vacancy rate | 1.1% ±1.8 pts | 0.6% | – |
| Rental vacancy rate | 3.3% ±2.4 pts | 4.7% | – |
| Single-family detached homes | 31.1% ±3.7 pts | 49.2% | – |
| Mobile homes | 0.7% ±0.8 pts | 0.6% | – |
| Built 2020 or later | 0.0% ±0.8 pts | 1.5% | – |
| Built 2010 to 2019 | 1.8% ±1.5 pts | 7.9% | – |
| Built 1939 or earlier | 2.2% ±1.2 pts | 4.5% | – |
| Households with no vehicle | 10.0% ±3.3 pts | 9.2% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How do people in Adelphi work and get to work?
51.8% of Adelphi's workers drive alone and 10.6% work from home. The average trip to work takes 37.3 minutes. The unemployment rate in 2020-2024 averaged 6.0%.
| Measure | Adelphi | Prince George's County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 74.0% ±3.0 pts | 69.6% | – |
| Unemployment rate | 6.0% ±2.9 pts | 6.4% | no clear change |
| Drove alone to work | 51.8% ±4.3 pts | 60.0% | – |
| Carpooled | 20.9% ±4.1 pts | 9.9% | – |
| Public transportation | 8.4% ±3.0 pts | 7.4% | – |
| Walked | 4.0% ±2.5 pts | 1.7% | – |
| Worked from home | 10.6% ±2.6 pts | 17.9% | +7.7 pts |
| Mean travel time to work | 37.3 min ±2.9 | 35.2 min | no clear change |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What census tracts are in Adelphi?
4 census tracts lie mostly in Adelphi, and 3 more reach into it (2020 census blocks). Their median household incomes run from $59,095 (Tract 8059.07) to $129,118 (Tract 8059.04).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 8059.04Prince George's County | 4,048 | $129,118 |
| Tract 8059.06Prince George's County | 3,945 | $78,026 |
| Tract 8059.07Prince George's County | 3,701 | $59,095 |
| Tract 8073.05Prince George's County | 3,956 | $103,866 |
| Tract 8059.09Prince George's County | 4,699 | $84,063 |
| Tract 8058.01Prince George's County | 4,046 | $81,985 |
| Tract 8064Prince George's County | 3,906 | $172,396 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 block assignment files (tract share = share of the tract's census blocks in Adelphi) · Census block assignment files
How does Adelphi compare with other places in Maryland?
Adelphi ranks 245th of 322 places in Maryland with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population (ACS 2020-2024) | 82nd | 326 |
| Residents per square mile | 32nd | 326 |
| Median household income | 245th | 322 |
| Per capita income | 275th | 326 |
| Median home value | 155th | 323 |
| Median gross rent | 140th | 288 |
| Poverty rate | 38th | 230 |
| Bachelor's degree or higher | 236th | 325 |
| Median age | 297th | 326 |
| Owner-occupied share | 304th | 323 |
| Work from home | 247th | 293 |
| Travel time to work | 51st | 325 |
Adelphi's figures with every place in Maryland (CSV)
Every place in Maryland, sortable · Compare Adelphi with other places
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How reliable are the figures for Adelphi?
8 of the 57 figures for Adelphi on this page carry a coefficient of variation over 40% and are marked with a ring: they come from a small sample, so read them as rough.
The American Community Survey samples about one household in eight over five years, so every figure is an estimate with a 90% margin of error (shown under each value). A ring marks an estimate whose coefficient of variation is over 40%. A change is called only when the gap between the two periods is larger than their combined 90% margin (the square root of the sum of the two squared margins), the Census Bureau's test. How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · ACS technical documentation
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Adelphi are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' school search.