12 ZIP Codes
| Zip Code | City | Population ↓ |
|---|---|---|
| 42320 | Beaver Dam | 9,128 |
| 42347 | Hartford | 5,829 |
| 42378 | Whitesville | 3,513 |
| 42349 | Horse Branch | 1,962 |
| 42343 | Fordsville | 1,267 |
| 42328 | Centertown | 1,158 |
| 42333 | Cromwell | 644 |
| 42361 | Olaton | 425 |
| 42354 | McHenry | 283 |
| 42369 | Rockport | 223 |
| 42370 | Rosine | 16 |
| 42338 | Dundee | 12 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 12 ZCTAs in Ohio County, Kentucky (US Census).