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County ZIP codes · Washington · FIPS 53035

Kitsap County, WA ZIP Codes

Kitsap County, Washington has 27 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 21 residential and 6 for PO boxes or a single organization. 20 of the residential ones lie mainly in Kitsap County and 1 mainly in a neighboring county; 2 cross the county line. Median household income ranges from $68,561 in 98337 (Bremerton) to $172,188 in 98110 (Bainbridge Island) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Kitsap County?

98110 · Bainbridge Island: $172k98310 · Bremerton: $76k98311 · Bremerton: $109k98312 · Bremerton: $90k98314 · Bremerton: $184k98315 · Silverdale: $80k98329 · Gig Harbor: $110k98337 · Bremerton: $69k98340 · Hansville: $80k98342 · Indianola: $103k98345 · Keyport: –98346 · Kingston: $115k98353 · Manchester: –98359 · Olalla: $114k98364 · Port Gamble: –98366 · Port Orchard: $92k98367 · Port Orchard: $116k98370 · Poulsbo: $117k98380 · Seabeck: $125k98383 · Silverdale: $111k98392 · Suquamish: $86k983129838098367983709834698366981109832998383983119834098359983109834298110 · Bainbridge Island: $172k98310 · Bremerton: $76k98311 · Bremerton: $109k98312 · Bremerton: $90k98314 · Bremerton: $184k98315 · Silverdale: $80k98329 · Gig Harbor: $110k98337 · Bremerton: $69k98340 · Hansville: $80k98342 · Indianola: $103k98345 · Keyport: –98346 · Kingston: $115k98353 · Manchester: –98359 · Olalla: $114k98364 · Port Gamble: –98366 · Port Orchard: $92k98367 · Port Orchard: $116k98370 · Poulsbo: $117k98380 · Seabeck: $125k98383 · Silverdale: $111k98392 · Suquamish: $86k98312983809836798370983469836698110983299838398311983409835998110 · Bainbridge Island: $172k98310 · Bremerton: $76k98311 · Bremerton: $109k98312 · Bremerton: $90k98314 · Bremerton: $184k98315 · Silverdale: $80k98329 · Gig Harbor: $110k98337 · Bremerton: $69k98340 · Hansville: $80k98342 · Indianola: $103k98345 · Keyport: –98346 · Kingston: $115k98353 · Manchester: –98359 · Olalla: $114k98364 · Port Gamble: –98366 · Port Orchard: $92k98367 · Port Orchard: $116k98370 · Poulsbo: $117k98380 · Seabeck: $125k98383 · Silverdale: $111k98392 · Suquamish: $86k98312983809836798370983469836698110983299838398340
The residential ZIP codes of Kitsap County (whole outlines, including the parts in neighboring counties), shaded by median household income in national fifths (ACS 2020-2024). <$54.1k$98.1k+no figure

Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).

How different are its ZIP codes?

The middle half of its ranked ZIP codes (1,000+ people living in households) report median household incomes between $90,449 and $114,779.

They carry 15 postal town names.

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).

All 21 residential ZIP codes in Kitsap County

20 ZIP codes lie mainly in Kitsap County; 1 more reaches into it from a neighboring county and follows the first table.

Residential ZIP codes mainly in Kitsap County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
98366 Port Orchard 36,965 1,579 $92k $476k 100%
98312 Bremerton 36,307 552 $90k $473k 100%
98370 Poulsbo 33,655 598 $117k $629k 100%
98367 Port Orchard 31,756 432 $116k $565k 100%
98311 Bremerton 28,168 2,516 $109k $472k 100%
98110 Bainbridge Island 24,631 892 $172k $1.16M 100%
98310 Bremerton 22,643 4,115 $76k $441k 100%
98383 Silverdale 21,604 1,245 $111k $596k 100%
98346 Kingston 9,920 341 $115k $613k 100%
98337 Bremerton 7,370 4,980 $69k $418k 100%
98315 Silverdale 6,112 551 $80k – 100%
98380 Seabeck 5,471 113 $125k $579k 94%
98359 Olalla 4,581 330 $114k $611k 100%
98392 Suquamish 2,984 1,671 $86k $452k 100%
98340 Hansville 2,721 364 $80k $570k 100%
98342 Indianola 1,338 493 $103k $699k 100%
98314 Bremerton 1,186 10,137 $184k – 100%
98345 Keyport 221 442 – $524k 100%
98353 Manchester no residents 0 – – 100%
98364 Port Gamble no residents 0 – – 100%

Partly in Kitsap County

Residential ZIP codes mainly in another county that reach at least 1% into Kitsap County, by their share here
In this county
98329 Gig Harbor 11,552 444 $110k $519k 1%

Download the 27 ZIP codes as CSV

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).

Which ZIP codes cross the county line?

2 ZIP codes of Kitsap County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in Kitsap County and in the neighboring counties
ZIPIn KitsapElsewhere
983291%Pierce County 99%
9838094%Mason County 6%

Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).

PO Box and single-organization ZIP codes

ZIP codes in Kitsap County without a residential area (GeoNames postal codes)
ZIPPostal name
98061Rollingbay
98322Burley
98378Retsil
98384South Colby
98386Southworth
98393Tracyton

Source: GeoNames postal codes (CC BY 4.0).

Which first three digits do Kitsap County's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Kitsap County's ZIP codes use 3 prefixes: 980, 981 and 983.

Three-digit prefixes of Kitsap County's ZIP codes, the sectional center for each (USPS labeling list L005, effective October 1, 2026) and how many of the prefix's codes are Kitsap County's
PrefixSectional centerHereAll codes
980 Seattle, WA (SCF 980) 1 71
981 Seattle, WA (SCF 980) 1 60
983 Tacoma, WA (SCF 983) 25 81

Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.