
Spokane County
- State:
- Washington
- County Seat:
- Spokane
Spokane County's estimated 2025 population is 554,885 with a growth rate of 0.31% in the past year according to the most recent United States census data. Spokane County is the 4th largest county in Washington. The 2010 population was 472,102 and has seen a growth of 17.53% since that time.