
Kitsap County
- State:
- Washington
- County Seat:
- Port Orchard
Kitsap County's estimated 2025 population is 277,348 with a growth rate of -0.06% in the past year according to the most recent United States census data. Kitsap County is the 7th largest county in Washington. The 2010 population was 251,696 and has seen a growth of 10.19% since that time.