The Prince George's County Police Department (PGPD) is the primary law enforcement agency in Prince George's County, Maryland in the United States, servicing a population of over 900,000 residents and visitors within 498 square miles (1,290 km2) of jurisdiction.

Prince George's County is located in the U.S. state of Maryland bordering the eastern portion of Washington, D.C. As of the 2020 U.S. census, the population was 967,201, making it the second-most populous county in Maryland, behind neighboring Montgomery County. The 2020 census counted an increase of nearly 104,000 in the previous ten years. Its county seat is Upper Marlboro. It is the largest and the second most affluent African American-majority county in the United States, with five of its communities identified in a 2015 top ten list.