ZIP Code 98278

98278 is one of Washington's ZIP codes, delivering to addresses in Oak Harbor, Island County.

City: Oak Harbor
County: Island County
State: Washington
Prefix: 982xx

Where this code sits

98278 is part of the 982xx range, the group of codes handled by one mail processing centre. Oak Harbor is served by 2 ZIP codes in total; the full list, with the county each falls in, is on the Oak Harbor page.

Oak Harbor Washington ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 98278 delivers to without sharing its boundary.

ZIP codes nearest 98278

The ZIP codes whose reference points sit closest to 98278.
ZIP code	Distance	Delivers to
ZIP code 98277	2.3 mi	Oak Harbor, WA
ZIP code 98257	7.9 mi	La Conner, WA
ZIP code 98239	8.4 mi	Coupeville, WA
ZIP code 98221	11 mi	Anacortes, WA
ZIP code 98282	13 mi	Camano Island, WA
ZIP code 98261	14 mi	Lopez Island, WA
ZIP code 98238	15 mi	Conway, WA
ZIP code 98292	17 mi	Stanwood, WA

Straight-line distance between place reference points, not driving distance. Where a place has no Census Gazetteer point, its postal centroid is used instead.

Each point is the reference point for 98278, plotted from its record coordinates.

Reference points and footprint
Not an official NANPA boundary
Not a USPS delivery area

Scope ZIP code 98278. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. A ZIP code is a set of delivery routes, not an area; the point shown is a record coordinate, not a centre.