Custer, Montana Custer, Montana Custer is a census-designated place (CDP) in Yellowstone County, Montana, United States. The population was 145 at the 2000 census. This community bears the name of U.S. Army General George Armstrong Custer who was defeated and killed at the Battle of Little Big Horn, which took place nearby in 1876. Custer is located at (46.128870, -107.556302). According to the United States Census Bureau, the CDP has a total area of , all of it land. According to the Köppen Climate Classification system, Custer has a semi-arid climate, abbreviated "BSk" on climate maps. As of the census of 2000,
George Armstrong Custer Volunteer Service: February 1, 1866<br> Lieutenant Colonel, 7th Cavalry: July 28, 1866 (killed at the Battle of the Little Bighorn, June 25, 1876)<br> On June 3, 1865, at Sheridan's behest, Major General Custer accepted command of the 2nd Division of Cavalry, Military Division of the Southwest, to march from Alexandria, Louisiana, to Hempstead, Texas, as part of the Union occupation forces. Custer arrived at Alexandria on June 27 and began assembling his units, which took more than a month to gather and remount. On July 17, he assumed command of the Cavalry Division of the Military Division of the Gulf