Adelphi, Maryland

Adelphi, Maryland
The Adelphi Mill in July 2007
Location of Adelphi, Maryland
Coordinates: 38°59′49″N 76°58′0″W / 38.99694°N 76.96667°W / 38.99694; -76.96667
Country United States
State Maryland
County Prince George's
Area
  Total
2.72 sq mi (7.04 km2)
  Land2.72 sq mi (7.03 km2)
  Water0.00 sq mi (0.01 km2)
Elevation
171 ft (52 m)
Population
 (2020)
  Total
16,823
  Density6,194.04/sq mi (2,391.72/km2)
Time zoneUTC−5 (Eastern (EST))
  Summer (DST)UTC−4 (EDT)
ZIP Codes
20783, 20787
Area codes301, 240
FIPS code24-00400
GNIS feature ID0596997

Adelphi is an unincorporated area and census-designated place in Prince George's County, Maryland, United States. Per the 2020 Census, the population was 16,823. 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.