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,
Bury My Heart at Wounded Knee Hills, angering the Lakota and Dakota living there. A peace council in 1875 tried to arrange for the US government to either purchase the mineral rights or outright ownership of the Black Hills, but both proposals were rejected by the Sioux. In 1876, a series of battles occur between the Sioux and US troops which initially ends when the Sioux defeat General Custer and his troops at the Battle of Little Bighorn on June 25. The humiliated US Army sends a peace council to sign a treaty that forces the Sioux out of the Black Hills to the Missouri River.