Fort Carson is a United States Army installation located near Colorado Springs, primarily in El Paso County, Colorado. It is 40 miles (64 km) north of Pueblo, Colorado in Pueblo County. The 137,000-acre (550 km²) installation extends south into Pueblo and Fremont counties. The portion of the installation located within El Paso County forms a census-designated place (CDP), which had a population of 13,815 at the 2010 census. Fort Carson is the home of the 4th Infantry Division, the 10th Special Forces Group, the 440th Civil Affairs Battalion (USAR), the 71st Ordnance Group (EOD), the 4th Engineer Battalion, the 1st Battalion, 25th Aviation Regiment, the 759th Military Police Battalion, the 10th Combat Support Hospital, the 43rd Sustainment Brigade, the Army Field Support Battalion-Fort Carson, the 423rd Transportation Company (USAR) and the 13th Air Support Operations Squadron of the United States Air Force.