Kennewick
- County:
- Benton County
- County Seat:
- No
- Area (mi²):
- 28.504
- State:
- Washington
Kennewick is a city located in Benton County, Washington. Kennewick has a 2026 population of 86,728. Kennewick is currently growing at a rate of 0.95% annually and its population has increased by 3.25% since the most recent census, which recorded a population of 84,000 in 2020.