Washington County ZIP Codes
Kansas, United States · 11 codes
Washington County in Kansas has 11 ZIP codes, from 66933 to 66968, serving 11 places.
ZIP codes in Washington
Frequently asked questions
What is the ZIP code of Washington?
Washington has 11 ZIP codes, from 66933 to 66968. The table lists the places each one serves.
How many places are listed in Washington County?
11 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.