12 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 42320 | Beaver Dam | 8,913 |
| 42347 | Hartford | 5,419 |
| 42378 | Whitesville | 3,490 |
| 42349 | Horse Branch | 1,933 |
| 42343 | Fordsville | 1,658 |
| 42328 | Centertown | 1,173 |
| 42333 | Cromwell | 760 |
| 42361 | Olaton | 696 |
| 42369 | Rockport | 246 |
| 42354 | McHenry | 205 |
| 42370 | Rosine | 83 |
| 42338 | Dundee | 27 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 12 ZCTAs in Ohio County, Kentucky (US Census).