Croom is an unincorporated community and census-designated place in Southern Prince George's County, Maryland, United States. As of the 2020 census it had a population of 2,720. Croom largely consists of former tobacco farms and forests converted to Washington bedroom subdivisions such as nearby Marlton. The main part of Patuxent River Park is in Croom.

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.