Monroe County, Illinois ZIP Codes
- ZIP records
8 - Cities represented
8 - Sum of listed ZIP population estimates
41,698
Population sum includes positive estimates in these ZIP records; it is not an official county population.
Top ZIP Codes by Population
| Rank | ZIP Code | City | Population estimate |
|---|---|---|---|
| 1 | 62298 | Waterloo | 18,208 |
| 2 | 62236 | Columbia | 14,154 |
| 3 | 62278 | Red Bud | 6,281 |
| 4 | 62295 | Valmeyer | 1,459 |
| 5 | 62244 | Fults | 928 |
| 6 | 62248 | Hecker | 521 |
| 7 | 62279 | Renault | 112 |
| 8 | 62256 | Maeystown | 35 |
Cities in Monroe County
ZIP Directory
Browse all ZIP data for Illinois
Methodology: Records are grouped by the source file's listed county and state. Population sums add positive ZIP-level estimates and are not official county totals; city counts use distinct city labels in the source.