 Chillum borders the adjacent communities of Avondale, Green Meadows, and Carole Highlands in Prince George's County as well as the city of Takoma Park in Montgomery County, and the Riggs Park (also known as, "Lamond Riggs"), Queens Chapel, and North Michigan Park neighborhoods of Northeast Washington D.C.The population was 33,513 at the 2010 census.In addition to being its own unincorporated neighborhood, Chillum is also considered to be its own Census Designated Place in Prince George's County.