Adelphi, Maryland Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates
The population of Adelphi, Maryland is 17,210 as of the 2023 American Community Survey, making it the 82nd-largest city in Maryland. The median household income is $80,833, the median home value is $401,700, and the median age is 32.9.
17,210
Population
6327
People / sq mi
$80,833
Median Income
$401,700
Median Home Value
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Adelphi covers 2.7 sq mi of land at 6327 people per square mile.
About Adelphi, MD
Homeownership is the standout figure in Adelphi: 42.7% of homes are owner-occupied, lower than the national rate. With 17,210 residents, Adelphi is a city in Maryland.
Household earnings are middling, with a median of $80,833 — near the US median of $78,538. The poverty rate is 11.7%, below the national 12.4%. Median home value is $401,700, with typical rent around $1,757.
Degree attainment is mid-range for US cities: 27.4% of adults hold a four-year degree, below the national 35.0%. Remote work is below the national 14.0% at 9.9%, and the average commute runs about 35 minutes each way.
Race & Ethnicity
| White | 14.0% |
| Black or African American | 30.2% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.5% |
| Two or More Races | 0.0% |
Economy & Income
$80,833
Median Household Income
$32,608
Per Capita Income
11.7%
Poverty Rate
4.5%
Unemployment Rate
Housing
$401,700
Median Home Value
$1,757
Median Rent
42.7%
Owner-Occupied
Education
72.1%
High School+
27.4%
Bachelor's+
Commute
10.5%
Drive Alone
53.5%
Public Transit
9.9%
Work From Home
34.6 min
Avg Commute
Community Profile
21.6%
Foreign Born
27.4%
Non-English at Home
3.0%
Veterans
8.1%
With Disability
72.6%
Health Insurance
99.7%
Internet Access
Employment by Industry
| Professional, Scientific & Management | 24.0% |
| Construction | 18.3% |
| Finance, Insurance & Real Estate | 14.6% |
| Education, Health Care & Social Services | 11.0% |
| Arts, Entertainment & Food Services | 5.7% |
| Information | 5.1% |
| Public Administration | 4.2% |
| Retail Trade | 3.2% |
| Manufacturing | 1.3% |
| Transportation & Warehousing | 1.0% |
| Agriculture & Mining | 0.2% |
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Frequently Asked Questions
Adelphi, Maryland has a population of 17,210 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 82nd-largest city in Maryland.
The median household income in Adelphi, Maryland is $80,833, with 11.7% of residents living below the federal poverty level.
The median home value in Adelphi, Maryland is $401,700, with median monthly rent at $1,757 and a homeownership rate of 42.7%.
The median age in Adelphi, Maryland is 32.9 years. The population is 51.6% male and 48.4% female.
Adelphi Cdp, MD Climate
Adelphi Cdp, MD has an average annual temperature of 13.6°C (56°F) and receives about 1091 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
13.6°C
Avg Temp
1091
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | 1° / 34° | 81 mm |
| February | 3° / 37° | 71 mm |
| March | 7° / 45° | 95 mm |
| April | 13° / 55° | 83 mm |
| May | 18° / 65° | 111 mm |
| June | 23° / 73° | 91 mm |
| July | 26° / 78° | 108 mm |
| August | 25° / 76° | 98 mm |
| September | 21° / 70° | 97 mm |
| October | 14° / 58° | 86 mm |
| November | 9° / 48° | 87 mm |
| December | 4° / 39° | 83 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Adelphi Cdp, MD
The most comfortable months to visit Adelphi Cdp, MD are typically September, June and May, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 32°C high). The coldest is January (near -4°C low). May is usually the wettest month.
Where to stay near Adelphi
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Statewide data for Maryland
Population, race, income, age, and trends across Maryland
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.