14 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 45011 | Hamilton | 73,596 |
| 45069 | West Chester | 55,414 |
| 45044 | Middletown | 53,909 |
| 45013 | Hamilton | 52,953 |
| 45014 | Fairfield | 46,023 |
| 45042 | Middletown | 28,812 |
| 45056 | Oxford | 27,391 |
| 45067 | Trenton | 15,085 |
| 45050 | Monroe | 11,833 |
| 45015 | Hamilton | 11,602 |
| 45053 | Okeana | 3,865 |
| 45064 | Somerville | 3,257 |
| 45062 | Seven Mile | 756 |
| 45055 | Overpeck | 179 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 14 ZCTAs in Butler County, Ohio (US Census).