12 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 45040 | Mason | 59,518 |
| 45036 | Lebanon | 42,204 |
| 45005 | Franklin | 32,251 |
| 45039 | Maineville | 28,335 |
| 45066 | Springboro | 27,545 |
| 45152 | Morrow | 14,850 |
| 45068 | Waynesville | 11,597 |
| 45065 | South Lebanon | 7,053 |
| 45162 | Pleasant Plain | 2,754 |
| 45054 | Oregonia | 2,693 |
| 45034 | Kings Mills | 968 |
| 45032 | Harveysburg | 683 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 12 ZCTAs in Warren County, Ohio (US Census).