14 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 45011 | Hamilton | 74,636 |
| 45069 | West Chester | 55,635 |
| 45044 | Middletown | 54,452 |
| 45013 | Hamilton | 53,533 |
| 45014 | Fairfield | 45,652 |
| 45042 | Middletown | 28,217 |
| 45056 | Oxford | 27,598 |
| 45067 | Trenton | 15,328 |
| 45050 | Monroe | 12,162 |
| 45015 | Hamilton | 11,102 |
| 45053 | Okeana | 3,717 |
| 45064 | Somerville | 3,281 |
| 45062 | Seven Mile | 667 |
| 45055 | Overpeck | 97 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 14 ZCTAs in Butler County, Ohio (US Census).