Population of Montana 2021
Population
With a population of 1,062,305 (2018 estimate), Montana is one of the most populous states in the United States. In addition, Montana is the third lowest population density in the United States after the states of Alaska and Wyoming. Since the 1980s, the region has experienced immigration from retirees and nature lovers, while younger people and long-established farming families often migrate.
89.9% of the population is white (87.5% non-Latin American whites), followed by Native Americans (Indians) at 6.4%. Hispanics make up 3.1%.
The twelve Indian tribes are the Kootenai, Blackfoot, Assiniboine, Northern Cheyenne, Salish and Anishinabe, Cree, Pend d’Oreille, Gros Ventre, Chippewa, Sioux, Crow. Around two thirds of them now live on reservations. Between 2000 and 2010, the Native American population grew by 18%.
Religions
The religious communities with the largest number of members in 2000 were the Catholic Church with 169,250, the Evangelical Lutheran Church in America with 50,287 and the Church of Jesus Christ of Latter-day Saints (Mormons) with 32,726 followers.
Top Counties by Population in Montana
| Rank | County Name | Population | Population Density (per km²) |
| 1 | Yellowstone County | 161,311 | 23.64 |
| 2 | Missoula County | 119,611 | 17.78 |
| 3 | Gallatin County | 114,445 | 17.63 |
| 4 | Flathead County | 103,817 | 7.86 |
| 5 | Cascade County | 81,377 | 11.65 |
| 6 | Lewis and Clark County | 69,443 | 7.75 |
| 7 | Ravalli County | 43,817 | 7.07 |
| 8 | Silver Bow County | 34,926 | 18.78 |
| 9 | Lake County | 29,110 | 7.52 |
| 10 | Lincoln County | 19,136 | 2.04 |
| 11 | Park County | 16,617 | 2.42 |
| 12 | Hill County | 16,607 | 2.21 |
| 13 | Glacier County | 13,707 | 1.77 |
| 14 | Big Horn County | 13,293 | 1.03 |
| 15 | Custer County | 12,103 | 1.24 |
| 16 | Sanders County | 11,855 | 1.66 |
| 17 | Jefferson County | 11,569 | 2.70 |
| 18 | Fergus County | 11,453 | 1.02 |
| 19 | Roosevelt County | 11,070 | 1.81 |
| 20 | Richland County | 10,924 | 2.02 |
| 21 | Carbon County | 10,410 | 1.96 |
| 22 | Stillwater County | 9,545 | 2.05 |
| 23 | Dawson County | 9,529 | 1.55 |
| 24 | Beaverhead County | 9,356 | 0.65 |
| 25 | Deer Lodge County | 9,161 | 4.80 |
| 26 | Rosebud County | 9,074 | 0.70 |
| 27 | Madison County | 7,831 | 0.84 |
| 28 | Valley County | 7,448 | 0.58 |
| 29 | Powell County | 6,979 | 1.16 |
| 30 | Blaine County | 6,630 | 0.61 |
| 31 | Teton County | 6,173 | 1.05 |
| 32 | Pondera County | 5,983 | 1.42 |
| 33 | Chouteau County | 5,905 | 0.57 |
| 34 | Broadwater County | 5,678 | 1.84 |
| 35 | Toole County | 4,864 | 0.98 |
| 36 | Musselshell County | 4,662 | 0.96 |
| 37 | Mineral County | 4,327 | 1.37 |
| 38 | Phillips County | 4,085 | 0.31 |
| 39 | Sweet Grass County | 3,721 | 0.77 |
| 40 | Sheridan County | 3,435 | 0.79 |
| 41 | Granite County | 3,220 | 0.72 |
| 42 | Fallon County | 3,119 | 0.74 |
| 43 | Liberty County | 2,370 | 0.64 |
| 44 | Wheatland County | 2,247 | 0.61 |
| 45 | Judith Basin County | 2,002 | 0.41 |
| 46 | Meagher County | 1,864 | 0.30 |
| 47 | Daniels County | 1,804 | 0.49 |
| 48 | Powder River County | 1,727 | 0.20 |
| 49 | McCone County | 1,705 | 0.25 |
| 50 | Garfield County | 1,320 | 0.11 |
| 51 | Carter County | 1,180 | 0.14 |
| 52 | Prairie County | 1,098 | 0.24 |
| 53 | Wibaux County | 1,045 | 0.45 |
| 54 | Golden Valley County | 863 | 0.28 |
| 55 | Treasure County | 690 | 0.27 |
| 56 | Petroleum County | 524 | 0.12 |