Prince George County is a county located in the Commonwealth of Virginia. As of the 2010 census, the population was 35,725. Its county seat is Prince George.

Prince George’s County is a county in the U.S. state of Maryland, bordering the eastern portion of Washington, D.C. As of the 2010 U.S. Census, the population was 863,420, making it the second-most populous county in Maryland. Its county seat is Upper Marlboro.