List of military installations in Montana

There are at least 60 current and former U.S. military installations located in Montana. Installations listed as historical are no longer in service and may have no physical remains in the state.

Current installations

 * Ekalaka Mini-Mutes Radar Site, Carter County, Montana, 45.66667°N, -104.36694°W, el. 3205 ft
 * Fort Missoula, Missoula County, Montana, 46.84222°N, -114.06028°W, el. 3150 ft
 * Fort William Henry Harrison, Lewis and Clark County, Montana, 46.61944°N, -112.11°W, el. 4127 ft
 * Hammond Mini-Mutes Radar Site, Carter County, Montana, 45.31944°N, -104.95389°W, el. 3717 ft
 * Havre Air Force Station, Hill County, Montana, 48.86806°N, -109.93972°W, el. 3127 ft
 * Haycreek Mini-Mute Radar Site, Carter County, Montana, 45.7°N, -104.73306°W, el. 3898 ft
 * Malmstrom Air Force Base, Cascade County, Montana, 47.50528°N, -111.18361°W, el. 3465 ft
 * Opheim Air Force Station, Valley County, Montana, 48.86194°N, -106.47667°W, el. 3294 ft

Historical installations
These installations are classified as historical by the U.S. Board on Geographic Names: Historical Features – Features that no longer exist on the landscape or no longer serve the original purpose.
 * Camp Baker Military Reservation, Meagher County, Montana, 46.67861°N, -111.17194°W, el. 4636 ft
 * Camp Cooke, Fergus County, Montana, 47.73278°N, -109.67611°W, el. 2431 ft
 * The first U.S. Army post built in Montana on the Judith River. Established August 1866. Disbanded June 1870. Named for General Philip St. George Cooke, the commander of the Department of the Platte at the time.
 * Camp Crook, Rosebud County, Montana, 45.63333°N, -106.66667°W, el. 3402 ft
 * Camp Cummings, Madison County, Montana, 45.29389°N, -111.94528°W, el. 5771 ft
 * Camp Devin, Carter County, Montana, location unknown
 * Camp Lewis, Fergus County, Montana, 47.06833°N, -109.42083°W, el. 3927 ft
 * Camp Loder, Garfield County, Montana, location unknown
 * Camp Merritt, Rosebud County, Montana, 45.63333°N, -106.66667°W, el. 3402 ft
 * Camp Morris, Liberty County, Montana, 48.90833°N, -111.25222°W, el. 3944 ft
 * Camp Poplar River, Roosevelt County, Montana, 48.11306°N, -105.19778°W, el. 1991 ft
 * Camp Porter, Dawson County, Montana, 47.15083°N, -104.6925°W, el. 2037 ft
 * Camp Rimini, Lewis and Clark County, Montana. About 20 miles west of Helena.
 * Camp Reeve, Petroleum County, Montana, 47.45583°N, -107.91389°W, el. 2247 ft
 * Camp Robert B Smith, Lewis and Clark County, Montana, 46.59028°N, -112.06667°W, el. 5279 ft
 * Cantonment Rocky Point (historical), Fergus County, Montana, 47.6°N, -108.4375°W, el. 2274 ft
 * Cut Bank Air Force Station (historical), Glacier County, Montana, 48.94194°N, -112.80528°W, el. 4167 ft
 * Cut Bank Army Air Field (historical), Glacier County, Montana, 48.60833°N, -112.37694°W, el. 3852 ft
 * Fort Assinniboine (historical), Hill County, Montana, 48.50139°N, -109.79167°W, el. 2671 ft
 * Fort Assinniboine Military Reservation (historical), Hill County, Montana, 48.50139°N, -109.79167°W, el. 2671 ft
 * Fort C F Smith (historical), Big Horn County, Montana, 45.31444°N, -107.90833°W, el. 3268 ft
 * Fort Carroll (historical), Fergus County, Montana, 47.57361°N, -108.37278°W, el. 2274 ft
 * Fort Custer Military Reservation (historical), Big Horn County, Montana, 45.72639°N, -107.575°W, el. 3038 ft
 * Fort Elizabeth Meagher (historical), Gallatin County, Montana, 45.64167°N, -110.91806°W, el. 5249 ft
 * Fort Ellis (historical), Gallatin County, Montana, 45.65444°N, -110.94306°W, el. 4987 ft
 * Fort Fizzle (historical), Missoula County, Montana, 46.745°N, -114.19056°W, el. 3383 ft
 * Fort Fizzle is a wooden barricade on the Lolo Trail erected by Missoula volunteers to stop the advance of Chief Joseph during the Nez Perce War in 1877. The barricade failed when the Nez Perce climbed a steep ravine behind the ridge and bypassed the soldiers. The failure to stop the Nez Perce caused the barricade to be named Fort Fizzle.
 * Fort Green Clay Smith (historical), Park County, Montana, 45.72222°N, -110.46111°W, el. 4383 ft
 * Fort Howes (historical), Powder River County, Montana, 45.28333°N, -106.14806°W, el. 3297 ft
 * Fort Howie (historical), Meagher County, Montana, 46.52778°N, -110.39167°W, el. 4931 ft
 * Established in 1867 near Martinsdale, Montana on the Musselshell River. Disbanded in 1867.  Named for Colonel Neil Howie of the Montana Militia.
 * Fort Ida Thoroughman (historical), Park County, Montana, 45.72222°N, -110.46111°W, el. 4383 ft
 * Fort Keogh (historical), Custer County, Montana, 46.37556°N, -105.88333°W, el. 2372 ft
 * Fort Logan (historical), Meagher County, Montana, 46.67861°N, -111.17194°W, el. 4636 ft
 * Fort Maginnis (historical), Fergus County, Montana, 47.14167°N, -109.13389°W, el. 4160 ft
 * Fort Maginnis Military Reservation (historical), Fergus County, Montana, 47.16667°N, -109.12556°W, el. 4236 ft
 * Fort Missoula (historical), Missoula County, Montana, 46.84278°N, -114.05806°W, el. 3153 ft
 * Fort Owen (historical), Ravalli County, Montana, 46.51972°N, -114.09583°W, el. 3294 ft
 * Fort Shaw (historical), Cascade County, Montana, 47.50889°N, -111.82°W, el. 3507 ft
 * Fort Skalkaho (historical), Ravalli County, Montana, 46.23889°N, -114.14222°W, el. 3599 ft
 * Fort Thomas F Meagher (historical), Park County, Montana, 45.7°N, -110.51667°W, el. 4442 ft
 * Fort William Henry Harrison (historical), Lewis and Clark County, Montana, 46.62361°N, -112.09722°W, el. 3963 ft
 * Glasgow Air Force Base (historical), Valley County, Montana, 48.40361°N, -106.51861°W, el. 2749 ft
 * Glasgow Army Air Field (historical), Valley County, Montana, 48.21639°N, -106.61528°W, el. 2297 ft
 * Havre Air Force Station (historical), Hill County, Montana, 48.88083°N, -109.94333°W, el. 3202 ft
 * Helena Barracks (historical), Lewis and Clark County, Montana, 46.62444°N, -112.06667°W, el. 3868 ft
 * Lewistown Air Force Station (historical), Fergus County, Montana, 47.2175°N, -109.22222°W, el. 6424 ft
 * Lewistown Army Air Field (historical), Fergus County, Montana, 47.04361°N, -109.47639°W, el. 4167 ft
 * Limestone Military Reservation (historical), Big Horn County, Montana, 45.30417°N, -107.92778°W, el. 3379 ft
 * Miles City Air Force Station (historical), Custer County, Montana, 46.29667°N, -105.97861°W, el. 2831 ft
 * National Cemetery Military Reservation (historical), Big Horn County, Montana, 45.56528°N, -107.43167°W, el. 3156 ft
 * Opheim Air Force Station (historical), Valley County, Montana, 48.86222°N, -106.47639°W, el. 3294 ft
 * Stanleys Stockade (historical), Dawson County, Montana, 46.92667°N, -104.86944°W, el. 2133 ft
 * An U.S. Army advance supply depot near Glendive, Montana on the Yellowstone River established in July 1873. Used by General Alfred Terry as his headquarters during the 1876 Sioux campaign.
 * Terrys Supply Camp (historical), Prairie County, Montana, 46.74056°N, -105.43417°W, el. 2192 ft
 * A U.S. Army steamboat landing at the mouth of Powder River built in 1877. Abandoned in 1882 when the Northern Pacific Railway reached Powder River.
 * Yaak Air Force Station (historical), Lincoln County, Montana, 48.86194°N, -115.72222°W, el. 4970 ft