Union ZIP Codes

List of Zip Codes of Union

The following table lists ZIP Codes associated with Union, Washington, based on ZIP Code Tabulation Area (ZCTA) data from the U.S. Census Bureau.

About Union Washington Zip Codes

The city of Union in Washington (WA) is served by approximately 1 ZIP Codes. These codes cover residential neighborhoods, business districts, and surrounding localities that use the city name in their mailing address.

Based on ZIP-level population estimates, the combined population covered by these ZIP Codes is around 1,666 people. Population density can vary significantly from one ZIP Code to another, reflecting the mix of dense urban blocks, commercial corridors, and lower-density residential areas.

The ZIP Codes associated with Union fall within county jurisdictions such as Mason. Each county manages local services, land use, and administration for the areas corresponding to its ZIP Codes.

Most ZIP codes for Union, Washington follow the America/Los_Angeles time zone.