Washington County ZIP Codes
Texas, United States · 5 codes
Washington County in Texas has 5 ZIP codes, from 77426 to 77880, serving 5 places.
ZIP codes in Washington
Frequently asked questions
What is the ZIP code of Washington?
Washington has 5 ZIP codes, from 77426 to 77880. The table lists the places each one serves.
How many places are listed in Washington County?
5 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.