County hub small town Washington

Kitsap County, WA

Aggregated demographic, housing, and geographic context for the 20 ZIP codes inside Kitsap County, drawn from public Census ACS and SimpleMaps data.

ZIP codes
20
in this county
Total population
272,876
across all listed ZIPs
Cities
14
distinct city/town names
Avg density
756
people / sq mi
Avg median income
—
household, ACS
Avg home value
—
owner-occupied

ZIP codes in Kitsap County

ZIPCityPopulationDensityMedian income
98366 Port Orchard 36,620 604 $88,807
98370 Poulsbo 33,071 227 $109,416
98312 Bremerton 31,762 187 $85,332
98367 Port Orchard 30,710 161 $105,846
98311 Bremerton 27,170 937 $98,714
98110 Bainbridge Island 24,557 343 $159,882
98383 Silverdale 22,541 502 $106,902
98310 Bremerton 21,635 1,518 $73,292
98346 Kingston 9,371 124 $110,946
98337 Bremerton 8,582 2,239 $73,363
98315 Silverdale 6,407 223 $84,485
98380 Seabeck 5,753 46 $123,162
98359 Olalla 4,991 139 $97,335
98392 Suquamish 3,231 699 $83,802
98340 Hansville 3,017 156 $79,286
98314 Bremerton 1,773 5,865 $179,464
98342 Indianola 1,331 189 $95,714
98345 Keyport 270 209 $133,086
98364 Port Gamble 67 737 —
98353 Manchester 17 8 —

About Kitsap County

Counties are the workhorse unit of American local government — they administer property taxes, run the courts and sheriff’s office, manage many road and library systems, and in much of the country they collect public health and zoning data that ZIP codes don’t. Kitsap County in Washington contains roughly 20 ZIP codes spread across 14 distinct cities and unincorporated communities, with an aggregate population of about 272,876. Reading those ZIPs together at the county level smooths over neighborhood-by-neighborhood noise and surfaces the broader economic and demographic shape of the area. For block-level detail, drill into any individual ZIP profile or compare against the wider Washington index.

The average density across listed ZIPs sits at roughly 756, which classifies the county overall as a small town environment. That label is a generalization — nearly every county contains both a relatively dense core and quieter outlying ZIPs, and the gap between them is often what determines where you actually want to live or open a business. Average median household income in our enriched ZIPs lands near —, with average owner-occupied home values around —; both numbers move dramatically as you cross from one ZIP to the next, so use the table above as a sorting tool, not a verdict.

If you’re moving into Kitsap County, the county itself is also where most of your real-life paperwork will land — vehicle registration, voter registration, property recording, and school district enrollment in many states. Knowing the county that contains your prospective ZIP makes it much easier to look up the right tax assessor, election office, or school district website. Our relocation guide walks through the order in which to tackle these handoffs after a move.

For service-area planning, the county is also where most US business licensing and many sales-tax rules are administered. Service businesses scoping Kitsap County should pair this aggregate view with the individual ZIP profiles to identify the densest, highest-income pockets first, then expand outward along whatever transportation corridor matches their delivery model.