Union, WA ZIP code

The ZIP code for Union, Washington is 98592. It is in Mason County.

98592

Population in these ZIPs: 2,059
Avg. median income: $138,400population-weighted
Typical home value: $513,900population-weighted
Metro area: Shelton, WA

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Union, WA ZIP code list

Union, WA ZIP codes
ZIP code	Population	Median income	Typical home value
98592	2,059	$138,370	$513,900

Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology

Cities near Union

Shelton 7 mi
Grapeview 8 mi
Tahuya 8 mi
Allyn 11 mi
Belfair 11 mi
Vaughn 13 mi
Lilliwaup 14 mi
Hoodsport 15 mi
Lakebay 16 mi
Matlock 16 mi
Longbranch 17 mi
Gig Harbor 20 mi

Frequently asked questions

What is the ZIP code for Union, WA?

The ZIP code for Union, WA is 98592.

What county is Union, Washington in?

Union ZIP codes are in Mason County.