14 ZIP Codes
| Zip Code | City | Population ↓ |
|---|---|---|
| 43130 | Lancaster | 62,933 |
| 43147 | Pickerington | 46,963 |
| 43110 | Canal Winchester | 43,544 |
| 43105 | Baltimore | 8,982 |
| 43112 | Carroll | 4,909 |
| 43107 | Bremen | 3,791 |
| 43102 | Amanda | 3,711 |
| 43154 | Stoutsville | 3,367 |
| 43046 | Millersport | 2,946 |
| 43155 | Sugar Grove | 2,361 |
| 43150 | Rushville | 2,300 |
| 43136 | Lithopolis | 2,216 |
| 43148 | Pleasantville | 1,898 |
| 43157 | Thurston | 597 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 14 ZCTAs in Fairfield County, Ohio (US Census).