COUNTY · WA
Kitsap County, Washington
Kitsap County is a county in Washington with FIPS code 53035 and an estimated population of 277,658 (Census 2023), 7th largest of 39 in the state.
County facts
- Name
- Kitsap County
- State
- Washington
- Type
- county
- FIPS code
- 53035
- State FIPS
- 53
- Population (2023)
- 277,658
- Change since 2020
- +0.7%
- State rank
- 7 of 39
Population is the Census Bureau’s Vintage 2023 estimate.
Questions
What is the FIPS code for Kitsap County?
Kitsap County, Washington has the five-digit FIPS code 53035: 53 for the state and 035 for the county.
What state is Kitsap County in?
Kitsap County is in Washington.
How do I know if an address is in this county?
Use the address lookup. ZIP codes and city names can cross county lines, so an address is the reliable check.
Sources: U.S. Census Bureau geographic reference files; Census Bureau Population Estimates, Vintage 2023. Last reviewed 2026-10-27.