# Counties in Montana by share of population aged 65 and over, 2025

All 56 values come from U.S. Census Bureau for 2025, so the places are comparable.

- Indicator id: `population_65_plus_share`
- Unit: %
- Definition: Residents aged 65 or over as a percentage of total population. Spain: 1 January, INE annual census. United States: 1 July, Census Bureau population estimates. World Bank figures for other countries and the World refer to mid-year.
- Source: U.S. Census Bureau, Population Estimates Program, county population by age and sex (cc-est agesex): residents aged 65 and over as a percentage of the total, 1 July; states and the nation summed from counties (https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/counties/asrh/cc-est2025-agesex-all.csv)
- Retrieved: 2026-10-09
- Citation: U.S. Census Bureau. Population Estimates Program, county population by age and sex (cc-est agesex): residents aged 65 and over as a percentage of the total, 1 July; states and the nation summed from counties. https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/counties/asrh/cc-est2025-agesex-all.csv. Retrieved 2026-10-09.
- Web page: https://invokely.ai/rankings/population-65-plus/montana-counties
- CSV: https://invokely.ai/download/rankings/population-65-plus/montana-counties.csv

| Rank | Place | % |
|---:|---|---:|
| 1 | Prairie County | 38.8 |
| 2 | Petroleum County | 35 |
| 3 | Sanders County | 34.9 |
| 4 | Meagher County | 32.7 |
| 5 | Judith Basin County | 32.5 |
| 6 | Golden Valley County | 32.5 |
| 7 | Lincoln County | 32.1 |
| 8 | Powder River County | 31.7 |
| 9 | Treasure County | 31.2 |
| 10 | Sweet Grass County | 31.1 |
| 11 | Carbon County | 31 |
| 12 | Madison County | 30.5 |
| 13 | Granite County | 30.2 |
| 14 | Ravalli County | 30 |
| 15 | Deer Lodge County | 30 |
| 16 | Mineral County | 29.7 |
| 17 | Daniels County | 29.3 |
| 18 | Carter County | 29 |
| 19 | McCone County | 28.9 |
| 20 | Wheatland County | 28.5 |
| 21 | Fergus County | 28.2 |
| 22 | Stillwater County | 28.2 |
| 23 | Lake County | 27.3 |
| 24 | Sheridan County | 27.2 |
| 25 | Musselshell County | 26.9 |
| 26 | Garfield County | 26.7 |
| 27 | Jefferson County | 26.6 |
| 28 | Valley County | 26.1 |
| 29 | Phillips County | 26 |
| 30 | Park County | 25.6 |
| 31 | Beaverhead County | 25.6 |
| 32 | Teton County | 25.5 |
| 33 | Powell County | 25.4 |
| 34 | Chouteau County | 25.1 |
| 35 | Wibaux County | 25.1 |
| 36 | Pondera County | 25.1 |
| 37 | Liberty County | 25 |
| 38 | Broadwater County | 23.4 |
| 39 | Dawson County | 23.2 |
| 40 | Flathead County | 23.1 |
| 41 | Fallon County | 22.9 |
| 42 | Silver Bow County | 22.7 |
| 43 | Custer County | 22.6 |
| 44 | Lewis and Clark County | 22.2 |
| 45 | Cascade County | 21 |
| 46 | Yellowstone County | 20.2 |
| 47 | Missoula County | 19.6 |
| 48 | Rosebud County | 19.1 |
| 49 | Blaine County | 19.1 |
| 50 | Richland County | 19 |
| 51 | Hill County | 18.8 |
| 52 | Toole County | 18.7 |
| 53 | Glacier County | 15.8 |
| 54 | Roosevelt County | 15.5 |
| 55 | Big Horn County | 15.3 |
| 56 | Gallatin County | 14.9 |