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
1890–2024U.S. Census (decennial), 1890–2020 + estimates.
Population pyramid
Idaho'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
379,177 (19.0%)
15 to 64
1,264,612 (63.3%)
65 and older
354,407 (17.7%)
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 Idaho's age structure, sex distribution and life expectancy.
| Median age | 37.1 years | |
| Female | 49.9% | |
| Male | 50.1% | |
| Under 18 | 25.2% | |
| 65 and older | 17.0% | |
| Life expectancy | 78.8 years |
Population, households and density
How many people and households live in Idaho, how concentrated they are and how the population is changing.
| Total population | 2.00 M | 38th in the U.S. |
| Density | 9 /km² | |
| Households | 740,000 | |
| Urban population | 70.6% | |
| Largest metro | Boise City (≈ 796,000) | |
| Growth | +1.8%/yr | 2020–2024, among the fastest in the U.S. |
Race, ethnicity and origin
Idaho is one of the least racially diverse states, though its Hispanic population — concentrated among agricultural workers in the Magic Valley — has grown steadily, alongside a historic Basque-American community in Boise.
| White (non-Hispanic) | 80.5% | |
| Hispanic or Latino | 13.3% | ≈ 266,000 |
| Two or more races | 3.0% | |
| Native American | 1.6% | |
| Asian | 1.7% | |
| Black or African American | 1.1% | |
| Mexican origin | ≈ 10.6% | Largest Hispanic subgroup |
| Basque-American community | ≈ 15,000 | Largest Basque population in the U.S. |