| Name | Benton County |
| State | Washington |
| FIPS Code | 53005 |
| County Seat | Prosser |
| Timezone | Pacific Daylight Time (PDT) |
| Population (2024) | 215,445 |
| Population Growth Rate(2020-2024) | 3.98% |
| Majority Ethnicity | White 70.25% |
| Public School Majority Ethnicity | White 56% |
| Partisan Voting Index | Republican:+11 |
| Unemployment Rate (May 2026) | 5.7% |
| Sales Tax Rate (2025) | 8.1% |
| Area Code(s) | 509 |
| Race/Ethnicity | Percentage of Population (2023) |
|---|---|
| White | 70.25% |
| African American | 1.65% |
| Hispanic | 24.09% |
| Asian | 2.87% |
| Native American | 0.92% |
| Hawaiin/Pacific Islander | 0.22% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 56.23% |
| African American | 2.14% |
| Hispanic | 33.72% |
| Asian | 2.3% |
| Native American | 0.32% |
| Hawaiin/Pacific Islander | 0.24% |