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City ZIP codes · Washington

Oak Harbor, WA ZIP Codes

2 ZIP codes use the postal name Oak Harbor, Washington (Census 2020 ZCTAs and GeoNames postal codes, October 2026), all residential. Oak Harbor's most populous ZIP code is 98277, with 40,917 people (ACS 2020-2024); 17% of its land is in the city of Oak Harbor.

  • ACS2020-24
  • Census2020
  • GeoNames2026

Where are Oak Harbor's ZIP codes?

98277: $83k median household income98278: – median household income982779827898277: $83k median household income98278: – median household income982779827898277: $83k median household income98278: – median household income9827798278
The 2 residential ZIP codes named Oak Harbor, shaded by median household income in national fifths (ACS 2020-2024). Select a ZIP to open it. <$54.1k$98.1k+no figure

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

All 2 residential ZIP codes of Oak Harbor

Residential ZIP codes with the postal name Oak Harbor, WA, largest first (ACS 2020-2024); sort by any column
County
98277 Island County 40,917 715 $83k $500k
98278 Island County 1,932 458 – –

Download the 2 ZIP codes as CSV

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; 2023 Gazetteer land areas (2020 ZCTAs); town names from simplemaps US ZIP Codes (CC BY 4.0) and GeoNames (CC BY 4.0).

Which counties do Oak Harbor's ZIP codes reach?

Oak Harbor's residential ZIP codes lie in Island County.

Which places do Oak Harbor's ZIP codes cover?

A postal name is not a city limit. By the Census Bureau's places, Oak Harbor's residential ZIP codes cover Oak Harbor itself and 1 other place, each listed with the ZIP codes that have at least 5% of their land in it or hold most of the place:

  • Whidbey Island Station census-designated 98278

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

Which first three digits do Oak Harbor's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Every ZIP code of Oak Harbor starts with 982.

Three-digit prefixes of Oak Harbor'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 Oak Harbor's
PrefixSectional centerHereAll codes
982 Seattle, WA (SCF 980) 2 76

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