Zip Code 98592 — Union, WA

ZIP Code 98592 is associated with Union, WA, in Mason County. The listed population estimate is 2,059; estimated density is 45.0 people per square mile. Among records with population estimates, it ranks #7 of 9 in Mason County and #362 of 597 in WA.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (47.328950, -123.079070)

Data MetricLocal Statistic
Postal / Zip Code98592
Primary CityUnion
State / ProvinceWA
CountyMason
Total Population2,059
Population Density45.0 people/sq mi
TimezoneAmerica/Los_Angeles

How 98592 Compares

MetricZIP 98592Mason County recordsWA records
Population estimate2,05966,064 (sum)7,816,021 (sum)
Population Density45.0 /sq mi----
County population rank#7 of 9----
State population rank#362 of 597----

Regional sums combine the population estimates in the listed ZIP records; they are not official county or state population totals.

Explore More ZIP Codes

Nearby ZIP Codes in WA

ZIP CodeCityDistancePopulation estimate
ZIP 98584Shelton6.9 mi40,606
ZIP 98546Grapeview7.3 mi2,430
ZIP 98588Tahuya7.8 mi2,114
ZIP 98524Allyn11.2 mi4,300
ZIP 98528Belfair11.8 mi11,940

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 →