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Zip Code 98592 — Union, WA

98592 is a ZIP Code associated with Union, WA, located within Mason. The postal region supports an estimated population of 2,059 residents across Data Pending housing units, with a population density of 45.0 people per square mile.

WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (47.328950, -123.079070)

Data Metric	Local Statistic
Postal / Zip Code	98592
Primary City	Union
State / Province	WA
County	Mason
Total Population	2,059
Median Household Income	Data Pending
Total Housing Units	Data Pending
Population Density	45.0 people/sq mi
Timezone	America/Los_Angeles

How 98592 Compares

Metric	ZIP 98592	Mason County	WA State Average
Population	2,059	66,064	7,816,021
Median Income	Data Pending	N/A	N/A
Population Density	45.0 /sq mi	--	--

Nearby ZIP Codes

ZIP Code	City	Distance	Population	Median Income
Zip 98584	Shelton	6.9 mi	40,606	N/A
Zip 98546	Grapeview	7.3 mi	2,430	N/A
Zip 98588	Tahuya	7.8 mi	2,114	N/A
Zip 98524	Allyn	11.2 mi	4,300	N/A
Zip 98528	Belfair	11.8 mi	11,940	N/A

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →