Washington County, Missouri
10 ZIP codes · 759.87 sq mi of land · FIPS 29221
| Population | 23,470 |
|---|---|
| State | Missouri |
| FIPS code | 29221 |
| Time zone | Central |
| Land area | 759.87 sq mi |
| Center (lat, long) | 37.9426, -90.8970 |
Area codes in this area
These are the area codes that most often serve Washington County (including overlays). The exact area code depends on the phone number — landlines, mobiles and overlays can differ even on the same street.
Cities and towns (largest first)
FletcherRichwoodsBelgradeBlackwellCadetCaledoniaIrondaleMineral PointPotosiTiff
ZIP codes in Washington County
63030 Fletcher63071 Richwoods63622 Belgrade63626 Blackwell63630 Cadet63631 Caledonia63648 Irondale63660 Mineral Point63664 Potosi63674 Tiff
Population: U.S. Census Bureau, ACS 5-year estimates, 2024.