14 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 43130 | Lancaster | 62,450 |
| 43147 | Pickerington | 45,929 |
| 43110 | Canal Winchester | 40,896 |
| 43105 | Baltimore | 9,059 |
| 43112 | Carroll | 4,961 |
| 43102 | Amanda | 3,797 |
| 43107 | Bremen | 3,528 |
| 43154 | Stoutsville | 3,447 |
| 43046 | Millersport | 3,128 |
| 43155 | Sugar Grove | 2,423 |
| 43136 | Lithopolis | 2,270 |
| 43150 | Rushville | 2,237 |
| 43148 | Pleasantville | 1,936 |
| 43157 | Thurston | 615 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 14 ZCTAs in Fairfield County, Ohio (US Census).