
Yakima County
- State:
- Washington
- County Seat:
- Yakima
Yakima County's estimated 2025 population is 255,891 with a growth rate of -0.15% in the past year according to the most recent United States census data. Yakima County is the 8th largest county in Washington. The 2010 population was 244,249 and has seen a growth of 4.77% since that time.