10 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 45822 | Celina | 20,170 |
| 45828 | Coldwater | 6,343 |
| 45846 | Fort Recovery | 4,763 |
| 45883 | Saint Henry | 4,099 |
| 45882 | Rockford | 2,719 |
| 45860 | Maria Stein | 2,437 |
| 45862 | Mendon | 1,182 |
| 45826 | Chickasaw | 419 |
| 45310 | Burkettsville | 255 |
| 45866 | Montezuma | 100 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 10 ZCTAs in Mercer County, Ohio (US Census).