| Zip Code | City | Population ↓ |
|---|---|---|
| 48162 | Monroe | 28,740 |
| 48161 | Monroe | 26,775 |
| 48182 | Temperance | 21,391 |
| 48160 | Milan | 14,163 |
| 48166 | Newport | 13,264 |
| 48117 | Carleton | 10,258 |
| 48144 | Lambertville | 9,672 |
| 48131 | Dundee | 7,978 |
| 48133 | Erie | 6,711 |
| 49270 | Petersburg | 5,634 |
| 49267 | Ottawa Lake | 4,024 |
| 48179 | South Rockwood | 3,613 |
| 48140 | Ida | 3,414 |
| 48145 | La Salle | 2,817 |
| 48159 | Maybee | 2,590 |
| 48157 | Luna Pier | 1,225 |
| 48177 | Samaria | 370 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 17 ZCTAs in Monroe County, Michigan (US Census).