Jefferson County ZIP Codes
Washington, United States · 7 codes
Jefferson County in Washington has 7 ZIP codes, from 98320 to 98376, serving 7 places.
ZIP codes in Jefferson
Frequently asked questions
What is the ZIP code of Jefferson?
Jefferson has 7 ZIP codes, from 98320 to 98376. The table lists the places each one serves.
How many places are listed in Jefferson County?
7 places.
Source: GeoNames postal codes (CC BY 4.0), geonames.org, retrieved 2026-10-22. Place coordinates are approximate. Check with the national postal service before sending anything valuable.