Thurston County Flag

Thurston County

State:
Washington
County Seat:
Olympia

Thurston County's estimated 2025 population is 299,731 with a growth rate of 0.12% in the past year according to the most recent United States census data. Thurston County is the 6th largest county in Washington. The 2010 population was 253,011 and has seen a growth of 18.47% since that time.

299,731
Total Population
415
Population Density (mi²)
6
Population Rank (State)
364 0.12%
Annual Population Growth

Thurston County Population

Demographics

Economics and Income Statistics