Chillum is an unincorporated place located in the U.S. state of Maryland. It is within Prince George's County part of the Washington-Arlington-Alexandria Metro Area. It has a total area of 3.4 square miles at 38°58′6″N 76°58′45″W. The elevation is 148 feet above sea level. As of the 2010 census data, it had a total population of 33,513. The population density was 9,800/sq mi. Estimated per capita income in 2016 was $24,353. Recent job growth is positively increased by 1.62 percent. The average travel time is 19 minutes. It has Zip code 20782.