Washington County ZIP Codes
Oklahoma, United States · 9 codes
Washington County in Oklahoma has 9 ZIP codes, from 74003 to 74082, serving 9 places.
ZIP codes in Washington
Frequently asked questions
What is the ZIP code of Washington?
Washington has 9 ZIP codes, from 74003 to 74082. The table lists the places each one serves.
How many places are listed in Washington County?
9 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.