14 ZIP Codes
| Zip Code | City | Population ↓ |
|---|---|---|
| 45011 | Hamilton | 75,864 |
| 45044 | Middletown | 56,217 |
| 45069 | West Chester | 56,037 |
| 45013 | Hamilton | 53,998 |
| 45014 | Fairfield | 45,773 |
| 45042 | Middletown | 27,652 |
| 45056 | Oxford | 27,376 |
| 45067 | Trenton | 15,471 |
| 45050 | Monroe | 12,248 |
| 45015 | Hamilton | 11,038 |
| 45053 | Okeana | 3,718 |
| 45064 | Somerville | 3,373 |
| 45062 | Seven Mile | 511 |
| 45055 | Overpeck | 198 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 14 ZCTAs in Butler County, Ohio (US Census).