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)
 • Land2.71 sq mi (7.03 km2)
 • Water0.0039 sq mi (0.01 km2)
Elevation
171 ft (52 m)
Population
 (2020)
 • Total
16,823
 • Density6,194.5/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.