Counties in Montana
Montana has 56 counties. Find yours from your location, or explore the map and the full list with seats, population, time zones and FIPS codes.
Updated · Data: U.S. Census Bureau
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Montana has 56 counties, home to about 1,105,072 people. Sort the table by any column, or search by name or seat.
Counties56Mountain time
Most peopleYellowstone County167,340 residents, 15% of the state
Fewest peoplePetroleum County401 residents (survey estimate; small counties have wide margins of error)
Most crowdedYellowstone County64 people per sq mi
Largest by landBeaverhead County5,542.7 sq mi
Priciest homesGallatin Countymedian value $604,900
Montana county map
Population4011.5k3.4k6.0k9.0k12k32kno data
County explorer: all 56 counties in Montana
| County | Seat | Population | Land sq mi | People / sq mi | Median home | Time zone | FIPS |
|---|---|---|---|---|---|---|---|
| Yellowstone | Billings | 167,340 | 2,633.4 | 64 | $317,600 | Mountain | 30111 |
| Gallatin | Bozeman | 122,194 | 2,605.4 | 47 | $604,900 | Mountain | 30031 |
| Missoula | Missoula | 119,639 | 2,593.0 | 46 | $423,100 | Mountain | 30063 |
| Flathead | Kalispell | 108,445 | 5,087.3 | 21 | $467,700 | Mountain | 30029 |
| Cascade | Great Falls | 84,601 | 2,698.2 | 31 | $243,300 | Mountain | 30013 |
| Lewis and Clark | Helena | 72,580 | 3,458.4 | 21 | $358,200 | Mountain | 30049 |
| Ravalli | Hamilton | 45,807 | 2,391.0 | 19 | $435,000 | Mountain | 30081 |
| Silver Bow | Butte | 35,589 | 718.0 | 50 | $223,500 | Mountain | 30093 |
| Lake | Polson | 32,073 | 1,490.5 | 22 | $369,200 | Mountain | 30047 |
| Lincoln | Libby | 20,656 | 3,612.6 | 6 | $258,700 | Mountain | 30053 |
| Park | Livingston | 17,484 | 2,802.5 | 6 | $429,700 | Mountain | 30067 |
| Hill | Havre | 16,260 | 2,899.4 | 6 | $187,600 | Mountain | 30041 |
| Glacier | Cut Bank | 13,713 | 2,995.2 | 5 | $153,400 | Mountain | 30035 |
| Big Horn | Hardin | 12,963 | 4,997.8 | 3 | $148,200 | Mountain | 30003 |
| Sanders | Thompson Falls | 12,936 | 2,760.4 | 5 | $323,800 | Mountain | 30089 |
| Jefferson | Boulder | 12,501 | 1,657.0 | 8 | $408,000 | Mountain | 30043 |
| Custer | Miles City | 11,938 | 3,783.3 | 3 | $204,200 | Mountain | 30017 |
| Fergus | Lewistown | 11,581 | 4,339.3 | 3 | $202,700 | Mountain | 30027 |
| Richland | Sidney | 11,329 | 2,084.6 | 5 | $259,000 | Mountain | 30083 |
| Carbon | Red Lodge | 10,877 | 2,047.9 | 5 | $379,300 | Mountain | 30009 |
| Roosevelt | Wolf Point | 10,665 | 2,354.6 | 5 | $119,400 | Mountain | 30085 |
| Beaverhead | Dillon | 9,590 | 5,542.7 | 2 | $282,000 | Mountain | 30001 |
| Deer Lodge | Anaconda | 9,512 | 736.7 | 13 | $209,700 | Mountain | 30023 |
| Stillwater | Columbus | 9,052 | 1,796.5 | 5 | $355,600 | Mountain | 30095 |
| Madison | Virginia City | 8,975 | 3,588.2 | 3 | $440,500 | Mountain | 30057 |
| Dawson | Glendive | 8,874 | 2,371.9 | 4 | $187,400 | Mountain | 30021 |
| Rosebud | Forsyth | 8,236 | 5,008.1 | 2 | $188,900 | Mountain | 30087 |
| Valley | Glasgow | 7,540 | 4,926.1 | 2 | $198,600 | Mountain | 30105 |
| Broadwater | Townsend | 7,310 | 1,192.4 | 6 | $364,800 | Mountain | 30007 |
| Powell | Deer Lodge | 7,029 | 2,326.0 | 3 | $255,700 | Mountain | 30077 |
| Blaine | Chinook | 6,997 | 4,227.5 | 2 | $124,900 | Mountain | 30005 |
| Teton | Choteau | 6,291 | 2,271.6 | 3 | $235,500 | Mountain | 30099 |
| Pondera | Conrad | 6,012 | 1,624.6 | 4 | $179,200 | Mountain | 30073 |
| Chouteau | Fort Benton | 5,888 | 3,972.5 | 1 | $185,100 | Mountain | 30015 |
| Musselshell | Roundup | 5,068 | 1,869.0 | 3 | $221,200 | Mountain | 30065 |
| Toole | Shelby | 5,028 | 1,914.9 | 3 | $187,400 | Mountain | 30101 |
| Mineral | Superior | 4,796 | 1,219.6 | 4 | $313,600 | Mountain | 30061 |
| Phillips | Malta | 4,224 | 5,140.4 | 1 | $175,000 | Mountain | 30071 |
| Sweet Grass | Big Timber | 3,713 | 1,855.5 | 2 | $295,500 | Mountain | 30097 |
| Sheridan | Plentywood | 3,677 | 1,676.9 | 2 | $111,600 | Mountain | 30091 |
| Granite | Philipsburg | 3,419 | 1,727.2 | 2 | $339,500 | Mountain | 30039 |
| Fallon | Baker | 2,817 | 1,620.6 | 2 | $237,000 | Mountain | 30025 |
| Judith Basin | Stanford | 2,053 | 1,869.7 | 1 | $214,200 | Mountain | 30045 |
| Wheatland | Harlowton | 2,049 | 1,422.5 | 1 | $172,700 | Mountain | 30107 |
| Meagher | White Sulphur Springs | 1,979 | 2,391.9 | 1 | $244,400 | Mountain | 30059 |
| Liberty | Chester | 1,968 | 1,430.0 | 1 | $116,800 | Mountain | 30051 |
| McCone | Circle | 1,818 | 2,642.2 | 1 | $197,400 | Mountain | 30055 |
| Powder River | Broadus | 1,762 | 3,298.2 | 1 | $149,400 | Mountain | 30075 |
| Daniels | Scobey | 1,524 | 1,426.3 | 1 | $177,800 | Mountain | 30019 |
| Carter | Ekalaka | 1,361 | 3,340.5 | 0 | $176,600 | Mountain | 30011 |
| Prairie | Terry | 1,251 | 1,736.6 | 1 | $167,100 | Mountain | 30079 |
| Wibaux | Wibaux | 1,148 | 889.6 | 1 | $92,300 | Mountain | 30109 |
| Garfield | Jordan | 938 | 4,676.6 | 0 | $178,300 | Mountain | 30033 |
| Golden Valley | Ryegate | 840 | 1,174.4 | 1 | $203,900 | Mountain | 30037 |
| Treasure | Hysham | 761 | 977.8 | 1 | $215,300 | Mountain | 30103 |
| Petroleum | Winnett | 401 | 1,655.6 | 0 | $173,700 | Mountain | 30069 |
Which Montana cities are in more than one county?
- Big Sky: Gallatin County 84.0%, Madison County 16.0% of residents
Sources: Census TIGER/Line 2024; ACS 2019-2023 5-year; Wikidata, CC0 (seats); timezone-boundary-builder (time zones). Data as of November 1, 2026. Not affiliated with any government agency.
FAQ
Frequently asked questions
How many counties are in Montana?
56.
What is the most populated county in Montana?
Yellowstone County, with about 167,340 people (15% of the state).
What is the least populated county in Montana?
Petroleum County, with about 401 people (a survey estimate with a wide margin of error).
What is the largest county in Montana by land?
Beaverhead County, 5,542.7 sq mi of land.
What county am I in, in Montana?
Use the tool at the top of this page: press Use my current location, or type your city or ZIP code.