Monroe County, Illinois
8 ZIP codes · 385.3 sq mi of land · FIPS 17133
| Population | 35,036 |
|---|---|
| State | Illinois |
| FIPS code | 17133 |
| Time zone | Central |
| Land area | 385.3 sq mi |
| Center (lat, long) | 38.2780, -90.1791 |
Area codes in this area
These are the area codes that most often serve Monroe 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)
ColumbiaFultsHeckerMaeystownRed BudRenaultValmeyerWaterloo
ZIP codes in Monroe County
62236 Columbia62244 Fults62248 Hecker62256 Maeystown62278 Red Bud62279 Renault62295 Valmeyer62298 Waterloo
Population: U.S. Census Bureau, ACS 5-year estimates, 2024.