Source: U.S. Census Bureau, Vintage 2024 population estimates and 2024 Gazetteer. Rankings among the 50 states.
Historical data
Pick an indicator to see its long-run evolution.
Population
1870–2024U.S. Census (decennial), 1870–2020 + estimates.
Population pyramid
Montana's civilian population by sex and five-year age group. Choose a year to see how the age structure has changed.
Tap an age group in the pyramid to see its detail.
Under 15
189,253 (16.7%)
15 to 64
705,291 (62.2%)
65 and older
239,351 (21.1%)
Source: U.S. Census Bureau, SC-EST2020 and SC-EST2024 age and sex estimates (civilian population, July 1).
Age, sex and longevity
The main indicators describing Montana's age structure, sex distribution and life expectancy.
| Median age | 40.4 years | |
| Female | 49.6% | |
| Male | 50.4% | |
| Under 18 | 20.6% | |
| 65 and older | 20.1% | |
| Life expectancy | 77.4 years |
Population, households and density
How many people and households live in Montana, how concentrated they are and how the population is changing.
| Total population | 1.13 M | 43rd in the U.S. |
| Density | 3 /km² | 48th in the U.S. |
| Households | 467,000 | |
| Largest metro | Billings (≈ 190,000) | |
| Growth | +1.2%/yr | 2020–2024, driven by in-migration |
Race, ethnicity and origin
Montana is predominantly white, with the largest minority group being American Indians living mainly on seven reservations, including the Crow, Blackfeet, Flathead and Fort Peck nations.
| White (non-Hispanic) | 85.2% | |
| Native American | 6.4% | 2nd highest share in the U.S. |
| Hispanic or Latino | 4.6% | ≈ 52,000 |
| Two or more races | 3.4% | |
| Asian | 1.0% | |
| Black or African American | 0.6% | |
| German ancestry | ≈ 27% | Largest reported ancestry |
| Federally recognized tribes | 8 | Seven reservations |