County · Missouri · United States
Washington County ZIP codes
8 ZIP codes · 8 cities · FIPS 29221
Key facts
- State
- Missouri (MO)
- FIPS code
- 29221
- Population
- 23,483
- Median household income
- $51,886
- Median age
- 40.2
- Land area
- 759.9 sq mi (1,968 km²)
- Population density
- 31 / sq mi
- Area codes
- 573
Cities and ZIP codes in Washington County (8)
| City | ZIP codes |
|---|---|
| Belgrade | 63622 |
| Cadet | 63630 |
| Caledonia | 63631 |
| Irondale | 63648 |
| Mineral Point | 63660 |
| Potosi | 63664 |
| Richwoods | 63071 |
| Tiff | 63674 |
About this page
County figures are Census county-level values (ACS 5-year); the ZIP list shows the ZIPs whose primary county this is — a ZIP on a border can also serve neighbouring counties.
Sources: U.S. Census Bureau (2020 county relationship file, ACS 5-year) · GeoNames. Methodology.