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 Michigan Infantry across the Chickahominy River above New Bridge. The attack was successful, resulting in the capture of 50 Confederate soldiers and the seizing of the first Confederate battle flag of the war. McClellan termed it a "very gallant affair" and congratulated Custer personally. In his role as aide-de-camp to McClellan, Custer began his life-long pursuit of publicity. Custer was promoted to the rank of captain on June 5, 1862. On July 17, he was reverted to the rank of first lieutenant. He participated in the Maryland Campaign in September to October, the Battle of South Mountain on September 14,