Prince George's County (often shortened to "PG County")[2][3] is a county located 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,[5] making it the second-most populous county in Maryland, behind Montgomery County. Its county seat is Upper Marlboro.[6] It is the largest and one of the most affluent African American-majority counties in the United States, with five of its communities identified in a 2015 top ten list.[7
https://en.wikipedia.org/wiki/Prince_George%27s_County,_Maryland