County · Illinois · United States
Monroe County ZIP codes
7 ZIP codes · 7 cities · FIPS 17133
Key facts
- State
- Illinois (IL)
- FIPS code
- 17133
- Population
- 34,969
- Median household income
- $101,635
- Median age
- 42.5
- Land area
- 385.3 sq mi (998 km²)
- Population density
- 91 / sq mi
- Area codes
- 618, 730
Cities and ZIP codes in Monroe County (7)
| City | ZIP codes |
|---|---|
| Columbia | 62236 |
| Fults | 62244 |
| Hecker | 62248 |
| Maeystown | 62256 |
| Renault | 62279 |
| Valmeyer | 62295 |
| Waterloo | 62298 |
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.