Lanham is an unincorporate community in Prince George's County in the State of Maryland in the United States of America. Because it is not formally incorporated, it has no official boundaries, but the United States Census Bureau has defined a census-designated place consisting of Lanham and the adjacent community of Seabrook, designated Lanham-Seabrook, for statistical purposes. The terminal of Metrorail's Orange Line, as well as an Amtrak station, are across the Capital Beltway in New Carrollton, Maryland. Lanham also has a hospital.