County in Idaho · 8,477 sq mi · 2 people per sq mi
17,875 people live in Idaho County. The typical household earns $66,325, and the median resident is 49.4 years old.
2026 projection
From 16,592 in 2020
Poverty rate 11.11%
Men 49 · Women 50.1
1870–2026
17,875
2026 projection
7.7% since 2020 (increase)
Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
1870–2026
17,875
2026 projection
7.7% since 2020 (increase)
Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
| 2026 | 17,875 | +1 | 0.01% |
|---|---|---|---|
| 2025 | 17,874 | +1 | 0.01% |
| 2024 | 17,873 | -8 | 0.04% |
| 2023 | 17,881 | +227 | 1.29% |
| 2022 | 17,654 | +594 | 3.48% |
| 2021 | 17,060 | +468 | 2.82% |
| 2020 | 16,592 | -31 | 0.19% |
| 2019 | 16,623 | +154 | 0.94% |
| 2018 | 16,469 | +77 | 0.47% |
| 2017 | 16,392 | +145 | 0.89% |
Showing 10 of 30 years.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101
Each square is about 1% of residents (roughly 174 people).
Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002
Half of households earn more, half earn less
Typical yearly pay for a worker 25 or older.
About 1 in 9 residents
58% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 58% | 59% | 57% |
| Never married | 22% | 24% | 20% |
| Divorced | 12% | 12% | 13% |
| Widowed | 7% | 4% | 10% |
| Separated | <1% | 1% | <1% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
8 sources, all from the U.S. Census Bureau