Idaho County's 2026 population is estimated at 17,880, reflecting a -0.09% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Idaho County is the 20th largest county in Idaho. The 2010 population was 16,311 and has grown 9.62% since 2010.
Data after 2023 is projected based on recent change
Overall: 49.4 years
Female: 50.1 years
Male: 49 years
There are 13,976 adults, (5,124 of whom are seniors) in Idaho County.
Female: 8,377 (48.1%)
Male: 9,055 (51.9%)
The racial composition of Idaho County includes 91.07% White, and smaller percentages for Native American, other race, Asian, Black or African American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 15,876 | 91.07% |
| Two or more races | 964 | 5.53% |
| Native American | 319 | 1.83% |
| Other race | 154 | 0.88% |
| Asian | 95 | 0.54% |
| Black or African American | 22 | 0.13% |
| Native Hawaiian or Pacific Islander | 2 | 0.01% |
Idaho County 's average per capita income is $45,026. Household income levels show a median of $66,325. The poverty rate stands at 11.11%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $86,968 | - |
| Families | $80,851 | $96,233 |
| Households | $66,325 | $81,593 |
| Non Families | $37,059 | $47,918 |
Average Income
Median Household Income
Poverty Rate