Upper Marlboro, officially the Town of Upper Marlboro, is the seat of Prince George’s County, Maryland in the United States. The population within the town limits was 631 at the 2010 U.S. Census, although Greater Upper Marlboro is many times larger.
Greater Upper Marlboro is an area of Prince George’s County, Maryland, United States, that completely surrounds Upper Marlboro, the county seat. It was formerly a census-designated place (CDP), with a population of 18,720 at the 2000 census. However, the 2010 census divided the area into several smaller CDPs, including portions of Marlboro Meadows, Brock Hall, Marlboro Village, Queenland, and Croom.
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