Jerome County's 2026 population is estimated at 27,020, reflecting a 1.82% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Jerome County is the 15th largest county in Idaho. The 2010 population was 22,438 and has grown 20.42% since 2010.
Data after 2023 is projected based on recent change
Overall: 34 years
Female: 33.2 years
Male: 34.4 years
There are 17,712 adults, (3,363 of whom are seniors) in Jerome County.
Female: 12,257 (48.7%)
Male: 12,916 (51.3%)
The racial composition of Jerome County includes 65.22% White, 14.15% other race, and smaller percentages for Native American, Black or African American, Asian and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 16,418 | 65.22% |
| Two or more races | 4,870 | 19.35% |
| Other race | 3,561 | 14.15% |
| Native American | 280 | 1.11% |
| Black or African American | 30 | 0.12% |
| Asian | 14 | 0.06% |
Jerome County 's average per capita income is $42,894. Household income levels show a median of $71,724. The poverty rate stands at 12.59%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $88,452 | - |
| Families | $74,949 | $95,332 |
| Households | $71,724 | $89,909 |
| Non Families | $36,781 | $58,945 |
Average Income
Median Household Income
Poverty Rate
