Lanham-Seabrook was a census-designated place (CDP) in Prince George's County, Maryland, in the United States, for the 2000 census.

For the 2010 census, the area was delineated as two separate CDPs, Lanham and Seabrook.

[1] According to the United States Census Bureau, the place had a total area of 5.3 square miles (14 km2), all of it land.

There were 6,468 housing units at an average density of 1,229.5 per square mile (474.7/km2).

19.2% of all households were made up of individuals, and 4.3% had someone living alone who was 65 years of age or older.