ZIP Code 98528

98528 is one of Washington's ZIP codes, delivering to addresses in Belfair, Mason County.

City: Belfair
County: Mason County
State: Washington
Prefix: 985xx

Where this code sits

98528 is part of the 985xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Belfair.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 98528 delivers to without sharing its boundary.

ZIP codes nearest 98528

The ZIP codes whose reference points sit closest to 98528.
ZIP code	Distance	Delivers to
ZIP code 98588	4.5 mi	Tahuya, WA
ZIP code 98524	6.2 mi	Allyn, WA
ZIP code 98546	7.3 mi	Grapeview, WA
ZIP code 98555	8.4 mi	Lilliwaup, WA
ZIP code 98592	9.5 mi	Union, WA
ZIP code 98394	10 mi	Vaughn, WA
ZIP code 98380	11 mi	Seabeck, WA
ZIP code 98329	11 mi	Gig Harbor, 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 98528, plotted from its record coordinates.

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

Scope ZIP code 98528. 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.