Washington County, Missouri Zip Codes

10 zips

Zip Code
City
Population ↓
63664Potosi9,039
63660Mineral Point3,647
63630Cadet3,512
63071Richwoods1,353
63648Irondale1,282
63626Blackwell941
63631Caledonia774
63622Belgrade726
63030Fletcher289
63674Tiff24

Overview of Zip Codes in Washington County

10
ZIP Codes

The data shown reflect ZCTAs from the US Census. As of 2024, there are 10 ZCTAs in Washington County, Missouri (US Census).