Twin Falls County's 2026 population is estimated at 98,719, reflecting a 1.13% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Twin Falls County is the 5th largest county in Idaho. The 2010 population was 77,547 and has grown 27.3% since 2010.
Data after 2023 is projected based on recent change
Overall: 36.1 years
Female: 36.6 years
Male: 35.6 years
There are 69,062 adults, (15,548 of whom are seniors) in Twin Falls County.
Female: 47,222 (50.4%)
Male: 46,512 (49.6%)
The racial composition of Twin Falls County includes 78.61% White, 7.6% other race, and smaller percentages for Asian, Black or African American, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 73,685 | 78.61% |
| Two or more races | 10,210 | 10.89% |
| Other race | 7,126 | 7.6% |
| Asian | 1,096 | 1.17% |
| Black or African American | 828 | 0.88% |
| Native American | 494 | 0.53% |
| Native Hawaiian or Pacific Islander | 295 | 0.31% |
Twin Falls County 's average per capita income is $42,787. Household income levels show a median of $67,409. The poverty rate stands at 11.48%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $97,345 | $112,002 |
| Families | $82,414 | $100,695 |
| Households | $67,409 | $90,415 |
| Non Families | $37,173 | $58,468 |
Average Income
Median Household Income
Poverty Rate