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ZIP codes

ZIP codes in Kitsap County, Washington

Kitsap County has 21 ZIP codes. 19 lie entirely inside it and 2 are shared with neighboring counties, so part of their land and their people are elsewhere. About 277,663 people live in the parts inside it (ACS 2020–2024).

By the All Map Tools Team

ZIP codes
21
1 more just touches the border (under 1% of their land)
Entirely inside
19
99% or more of their land
Shared with other counties
2
Most with Mason County (1)
Most populated ZIP
98366
36,965 people · Port Orchard
Least populated ZIP
98345
221 people · Keyport; 2 more with nobody living there
Largest ZIP by land
98367
74 sq mi · Port Orchard

Map of the ZIP codes in Kitsap County

Island County Jefferson County King County Mason County Pierce County 98110 · Bainbridge Island · 24,631 people · 100% in the county 98310 · Bremerton · 22,643 people · 100% in the county 98311 · Tracyton · 28,168 people · 100% in the county 98312 · Bremerton · 36,307 people · 99.8% in the county 98314 · Bremerton · 1,186 people · 100% in the county 98315 · Bangor Base · 6,112 people · 100% in the county 98329 · Key Center · 11,552 people · 1.0% in the county 98337 · Bremerton · 7,370 people · 100% in the county 98340 · Hansville · 2,721 people · 100% in the county 98342 · Indianola · 1,338 people · 100% in the county 98345 · Keyport · 221 people · 100% in the county 98346 · Port Gamble Tribal Community · 9,920 people · 100% in the county 98353 · 0 people · 100% in the county 98359 · Burley · 4,581 people · 100% in the county 98364 · 0 people · 100% in the county 98366 · Port Orchard · 36,965 people · 100% in the county 98367 · Port Orchard · 31,756 people · 100% in the county 98370 · Suquamish · 33,655 people · 100% in the county 98380 · Seabeck · 5,471 people · 94% in the county 98383 · Silverdale · 21,604 people · 100% in the county 98392 · Suquamish · 2,984 people · 100% in the county 98528 · Belfair · 11,940 people · <0.1% in the county
  • Entirely in the county (99% or more of its land)
  • Shared, mostly in this county
  • Shared, mostly in other counties
  • Neighboring counties
Open in the interactive tool

Each area is a ZIP code with its number where it fits. Hover over one to see its name.

All ZIP codes in Kitsap County

21 ZIP codes in Kitsap County, WA, by number
ZIP code Main city Population Land in the county Residents in the county
98110 Bainbridge Island 24,631 100% 24,631
98310 Bremerton 22,643 100% 22,643
98311 Tracyton 28,168 100% 28,168
98312 Bremerton 36,307 99.8% ≈ 36,297
98314 Bremerton 1,186 100% 1,186
98315 Bangor Base 6,112 100% 6,112
98329 Key Center 11,552 1.0% ≈ 154
98337 Bremerton 7,370 100% 7,370
98340 Hansville 2,721 100% 2,721
98342 Indianola 1,338 100% 1,338
98345 Keyport 221 100% 221
98346 Port Gamble Tribal Community 9,920 100% 9,920
98353 — 0 100% 0
98359 Burley 4,581 100% 4,581
98364 — 0 100% 0
98366 Port Orchard 36,965 100% 36,965
98367 Port Orchard 31,756 100% 31,756
98370 Suquamish 33,655 100% 33,655
98380 Seabeck 5,471 94% ≈ 5,354
98383 Silverdale 21,604 100% 21,604
98392 Suquamish 2,984 100% 2,984

They also touch the county with under 1% of their land, so they aren’t counted: 98528.

ZIP codes shared with other counties

These 2 ZIP codes have part of their land in another county. The first figure is the share of their land in Kitsap County; then, where the rest lies.

Cities and prefixes

By main city (the city, town or CDP each ZIP shares the most land with), the ones with the most are Bremerton (4), Port Orchard (2), Suquamish (2), Bainbridge Island (1), Bangor Base (1), and Burley (1); 14 places in all.

They start with 2 different three-digit prefixes, one per USPS sorting center: 981 and 983.

Neighboring counties

Each one with its ZIP codes. Those without a page of their own open in the tool.

Tools for this county

ZIP codes by county or city The same ZIP codes on an interactive map, with the list as CSV or to copy County map with cities Its cities, towns and CDPs with their population ZIP codes in a radius The ZIP codes within 10 miles of its center, or any distance you like

Sources

  • U.S. Census Bureau, 2020 ZCTA to County, ZCTA to Place and ZCTA to Census Tract Relationship Files (and the 2022 County Subdivision to ZCTA file for Connecticut). Public domain.
  • U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, table B01003 (population of each ZIP code, census tract and Connecticut town). Public domain.
  • U.S. Census Bureau, Vintage 2025 Population Estimates (county population) and 2025 Gazetteer Files (land area and interior point of each ZIP code). Public domain.
  • U.S. Census Bureau, Cartographic Boundary Files: ZCTAs 2020 and counties 2025, 1:500,000; county adjacency file 2025. Public domain.

How we count. ZIP codes here are the Census Bureau’s ZIP Code Tabulation Areas (ZCTAs), the areas it draws to match USPS ZIP codes; ZIPs with no area of their own (PO boxes, single buildings) aren’t included. A ZIP can cross county lines: “Land in the county” is the exact share of its land inside, from the Census relationship files. “Residents in the county” is the whole ZIP for those entirely inside; for shared ones it’s an estimate, spreading the people of each census tract over the land it shares with the ZIP. Population: ACS 2020–2024. Methodology.

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