Ranking of Montana Counties By Total Voting-age Population (18yrs and over) from Census 2020
Updated on August 22, 2023.
According to the data from the US 2020 Census, as at April 2020, among all the counties in Montana, Yellowstone County had the highest voting-age population (18 years and over) (126.57K), followed by Gallatin County (95.46K), and Missoula County (95.04K).
The chart below shows the top 10 counties with high voting-age population, and the table below shows the ranking of all Montana counties based on voting-age population.
You can also see the ranking of counties by population for other states as well as for the whole United States.
You may also be interested in:
Related Topics: Montana Census 2020 Topic List.
Data Source: US Census Bureau, 2020 Census.
Ranking of Montana Counties By Total Voting-age Population from Census 2020
Items per page:
0 of 0
| Rank | County | Voting-age Population |
|---|---|---|
| 1 | Yellowstone County | 126567 |
| 2 | Gallatin County | 95459 |
| 3 | Missoula County | 95035 |
| 4 | Flathead County | 81505 |
| 5 | Cascade County | 65587 |
| 6 | Lewis and Clark County | 55685 |
| 7 | Ravalli County | 35657 |
| 8 | Silver Bow County | 28121 |
| 9 | Lake County | 23912 |
| 10 | Lincoln County | 16037 |
| 11 | Park County | 14273 |
| 12 | Hill County | 11997 |
| 13 | Sanders County | 10214 |
| 14 | Jefferson County | 9566 |
| 15 | Glacier County | 9448 |
| 16 | Custer County | 9247 |
| 17 | Fergus County | 9076 |
| 18 | Big Horn County | 8747 |
| 19 | Richland County | 8679 |
| 20 | Carbon County | 8506 |
| 21 | Deer Lodge County | 7851 |
| 22 | Beaverhead County | 7524 |
| 23 | Roosevelt County | 7460 |
| 24 | Madison County | 7231 |
| 25 | Stillwater County | 7095 |
| 26 | Dawson County | 6974 |
| 27 | Rosebud County | 6076 |
| 28 | Powell County | 5921 |
| 29 | Valley County | 5821 |
| 30 | Broadwater County | 5309 |
| 31 | Blaine County | 4965 |
| 32 | Teton County | 4768 |
| 33 | Pondera County | 4459 |
| 34 | Chouteau County | 4346 |
| 35 | Toole County | 3971 |
| 36 | Musselshell County | 3820 |
| 37 | Mineral County | 3719 |
| 38 | Phillips County | 3235 |
| 39 | Sweet Grass County | 2923 |
| 40 | Sheridan County | 2786 |
| 41 | Granite County | 2706 |
| 42 | Fallon County | 2209 |
| 43 | Judith Basin County | 1647 |
| 44 | Wheatland County | 1610 |
| 45 | Meagher County | 1591 |
| 46 | Liberty County | 1492 |
| 47 | Powder River County | 1379 |
| 48 | McCone County | 1353 |
| 49 | Daniels County | 1311 |
| 50 | Carter County | 1088 |
| 51 | Garfield County | 897 |
| 52 | Prairie County | 883 |
| 53 | Wibaux County | 730 |
| 54 | Golden Valley County | 661 |
| 55 | Treasure County | 581 |
| 56 | Petroleum County | 413 |