Washington County ZIP Codes
Illinois, United States · 10 codes
Washington County in Illinois has 10 ZIP codes, from 62214 to 62877, serving 10 places.
ZIP codes in Washington
Frequently asked questions
What is the ZIP code of Washington?
Washington has 10 ZIP codes, from 62214 to 62877. The table lists the places each one serves.
How many places are listed in Washington County?
10 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.