| Place Name | Prosser |
| Place Type | City |
| ZIP Code(s) | 99350 |
| County | Benton County |
| Area Code(s) | 509 |
| Timezone | Pacific Daylight Time (PDT) |
| Population (2022) | 5,680 |
| Population Growth Rate (2010-19) | 6.09% |
| Majority Ethnicity | White 53.99% |
| Metro/Micro Stats Area | Kennewick-Richland, WA |
| US Congressional District(s) | Washington 4th |
| State House Districts | 16 |
| State Senate Districts | 16 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 53.99% |
| African American | 1.63% |
| Hispanic | 0.19% |
| Asian | 1.6% |
| Native American | 0.37% |
| Hawaiin/Pacific Islander | 42.23% |