Benton County's 2026 population is estimated at 224,513, reflecting a 1.26% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Benton County is the 10th largest county in Washington. The 2010 population was 176,467 and has grown 27.23% since 2010.
Overall: 36.3 years
Female: 37.1 years
Male: 35.5 years
There are 157,326 adults, (33,796 of whom are seniors) in Benton County.
Female: 105,583 (49.6%)
Male: 107,322 (50.4%)
The racial composition of Benton County includes 69.66% White, 9.11% other race, 3.13% Asian, and smaller percentages for Black or African American, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 148,319 | 69.66% |
| Two or more races | 32,236 | 15.14% |
| Other race | 19,406 | 9.11% |
| Asian | 6,663 | 3.13% |
| Black or African American | 3,542 | 1.66% |
| Native American | 2,237 | 1.05% |
| Native Hawaiian or Pacific Islander | 502 | 0.24% |
Benton County 's average per capita income is $58,259. Household income levels show a median of $89,874. The poverty rate stands at 10.99%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $123,946 | $151,359 |
| Families | $106,180 | $131,135 |
| Households | $89,874 | $113,863 |
| Non Families | $55,217 | $69,893 |
Average Income
Median Household Income
Poverty Rate