12 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 45040 | Mason | 57,214 |
| 45036 | Lebanon | 42,346 |
| 45005 | Franklin | 31,739 |
| 45039 | Maineville | 29,112 |
| 45066 | Springboro | 26,144 |
| 45152 | Morrow | 13,617 |
| 45068 | Waynesville | 11,947 |
| 45065 | South Lebanon | 6,604 |
| 45054 | Oregonia | 2,517 |
| 45162 | Pleasant Plain | 2,449 |
| 45034 | Kings Mills | 1,007 |
| 45032 | Harveysburg | 666 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 12 ZCTAs in Warren County, Ohio (US Census).