ZIP Code 98592

98592 is one of Washington's ZIP codes, delivering to addresses in Union, Mason County.

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

Where this code sits

98592 is part of the 985xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Union.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 98592 delivers to without sharing its boundary.

ZIP codes nearest 98592

The ZIP codes whose reference points sit closest to 98592.
ZIP code	Distance	Delivers to
ZIP code 98546	7.5 mi	Grapeview, WA
ZIP code 98548	7.6 mi	Hoodsport, WA
ZIP code 98588	7.8 mi	Tahuya, WA
ZIP code 98584	8.5 mi	Shelton, WA
ZIP code 98528	9.5 mi	Belfair, WA
ZIP code 98524	10 mi	Allyn, WA
ZIP code 98555	12 mi	Lilliwaup, WA
ZIP code 98394	14 mi	Vaughn, 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 98592, plotted from its record coordinates.

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

Scope ZIP code 98592. 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.