Fort Keogh is a former United States Army post located at the western edge of modern Miles City, in the U.S. state of Montana. It is situated on the south bank of the Yellowstone River, at the mouth of the Tongue River.
Built: 1876
Controlled by: United States
In use: 1876–1924
Battles/wars: Indian Wars
Nearest city: Miles City, Montana
Area: 10 acres (4.0 ha)
Past commanders: Colonel Nelson A. Miles, 5th Infantry · Colonel Peter T. Swaine, 22nd Infantry