Founded in 1798, Ohio County is one of 120 counties in the state of Kentucky. Historically, Ohio County was formed from Hardin County. The city of Hartford is the county seat. With FIPS code of 183, Ohio County has a population of 23,688 and area of 594 square miles (1,538 km2).
List of all cities in Ohio County, KY alphabetically
| City/Town | Postal Code | Area Code |
| Beaver Dam, KY | 42320 | 270 |
| Centertown, KY | 42328 | 270 |
| Cool Springs, KY | 42320 | 270 |
| Cromwell, KY | 42333 | 270 |
| Dundee, KY | 42338 | 270 |
| Echols, KY | 42320 | 270 |
| Fordsville, KY | 42343 | 270 |
| Hartford, KY | 42347 | 270 |
| Horse Branch, KY | 42349 | 270 |
| Horton, KY | 42320 | 270 |
| McHenry, KY | 42354 | 270 |
| Narrows, KY | 42347 | 270 |
| Nineteen, KY | 42320 | 270 |
| Olaton, KY | 42361 | 270 |
| Prentiss, KY | 42320 | 270 |
| Render, KY | 42320 | 270 |
| Reynolds Station, KY | 42368 | 270 |
| Rockport, KY | 42369 | 270 |
| Rosine, KY | 42370 | 270 |
| Schultztown, KY | 42320 | 270 |
| Taylor Mines, KY | 42320 | 270 |
| Trisler, KY | 42343 | 270 |
| Yeaman, KY | 42343 | 270 |