There are currently 56 counties in the state of Montana, with two consolidated city-counties. Each county has its own attractions, terrain differences, mountains, parks, and tourist hot spots. Locals are very proud of their state and you will find many county-specific activities going on throughout the year. Browse by Montana towns.
Jump to: Counties in Montana By Population
Counties in Montana
A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z
B
C
D
F
G
H
J
L
M
P
- Park County
- Petroleum County
- Phillips County
- Pondera County
- Powder River County
- Powell County
- Prairie County
R
S
T
V
W
Y
Montana’s Ten Largest Counties
- Yellowstone County
- Missoula County
- Gallatin County
- Flathead County
- Cascade County
- Lewis and Clark County
- Ravalli County
- Silver Bow County
- Lake County
- Lincoln County
The Counties in Montana By Population
The 56 counties in Montana combine for a total population for the state of 1,084,225 (2021 census). There are just 4 counties with a population of over 100,000, these include Yellowstone, Missoula, Gallatin, and Flathead. On the opposite end of the spectrum, we have Wibaux, Golden Valley, Treasure, and Petroleum with fewer than 1,000 people in the entire county!
The data below covers the population from all 56 counties, it comes from the 2021 census conducted by the U.S. Census Bureau and is updated frequently to reflect the most recent data possible.
Click here to view the population of towns in Montana.
| County | Population Total (2021) | Population Total (2020) | Change (2020) |
|---|---|---|---|
| Yellowstone | 167,146 | 165,045 | 2,101 |
| Missoula | 119,533 | 118,238 | 1,295 |
| Gallatin | 122,713 | 119,502 | 3,211 |
| Flathead | 108,454 | 104,773 | 3,681 |
| Cascade | 84,511 | 84,328 | 183 |
| Lewis and Clark | 72,223 | 71,093 | 1,130 |
| Ravalli | 45,959 | 44,351 | 1,608 |
| Silver Bow | 35,411 | 35,168 | 243 |
| Lake | 32,033 | 31,259 | 774 |
| Lincoln | 20,525 | 19,731 | 794 |
| Park | 17,473 | 17,193 | 280 |
| Hill | 16,179 | 16,250 | -71 |
| Glacier | 13,785 | 13,747 | 38 |
| Big Horn | 12,957 | 13,051 | -94 |
| Jefferson | 12,470 | 12,133 | 337 |
| Sanders | 12,959 | 12,451 | 508 |
| Custer | 11,916 | 11,859 | 57 |
| Fergus | 11,617 | 11,457 | 160 |
| Richland | 11,283 | 11,501 | -218 |
| Roosevelt | 10,821 | 10,780 | 41 |
| Carbon | 10,847 | 10,512 | 335 |
| Stillwater | 9,044 | 9,010 | 34 |
| Beaverhead | 9,524 | 9,372 | 152 |
| Deer Lodge | 9,491 | 9,413 | 78 |
| Madison | 8,917 | 8,657 | 260 |
| Rosebud | 8,124 | 8,298 | -174 |
| Dawson | 8,904 | 8,922 | -18 |
| Valley | 7,537 | 7,551 | -14 |
| Powell | 6,999 | 6,934 | 65 |
| Blaine | 6,980 | 7,002 | -22 |
| Broadwater | 7,288 | 6,846 | 442 |
| Teton | 6,269 | 6,242 | 27 |
| Pondera | 5,994 | 5,882 | 112 |
| Chouteau | 5,916 | 5,899 | 17 |
| Toole | 5,011 | 4,964 | 47 |
| Musselshell | 4,896 | 4,747 | 149 |
| Mineral | 4,860 | 4,565 | 295 |
| Phillips | 4,192 | 4,190 | 2 |
| Sweet Grass | 3,723 | 3,671 | 52 |
| Granite | 3,344 | 3,308 | 36 |
| Sheridan | 3,527 | 3,518 | 9 |
| Fallon | 3,017 | 3,033 | -16 |
| Liberty | 1,946 | 1,960 | -14 |
| Wheatland | 2,059 | 2,093 | -34 |
| Judith Basin | 2,044 | 2,017 | 27 |
| Meagher | 1,964 | 1,925 | 39 |
| Powder River | 1,702 | 1,693 | 9 |
| McCone | 1,718 | 1,733 | -15 |
| Daniels | 1,686 | 1,658 | 28 |
| Garfield | 1,209 | 1,172 | 37 |
| Carter | 1,428 | 1,413 | 15 |
| Prairie | 1,091 | 1,076 | 15 |
| Wibaux | 934 | 928 | 6 |
| Golden Valley | 831 | 820 | 11 |
| Treasure | 768 | 761 | 7 |
| Petroleum | 519 | 498 | 21 |