Redstone Arsenal (RSA) is a United States Army post and a census-designated place (CDP) adjacent to Huntsville in Madison County, Alabama, United States and is part of the Huntsville-Decatur Combined Statistical Area. The Arsenal is a garrison for various tenants across the Department of Defense, Department of Justice, and NASA. RSA has benefited from decisions by the Defense Base Realignment and Closure Commission. The Redstone Arsenal CDP had a population of 1,946 as of the 2010 census. The base contains a government and contractor workforce that averages 36,000 to 40,000 personnel daily.