Founded in 1854, Lyon County is one of 120 counties in the state of Kentucky. Historically, Lyon County was formed from Caldwell County. The city of Eddyville is the county seat. With FIPS code of 143, Lyon County has a population of 8,803 and area of 216 square miles (559 km2).
List of all cities in Lyon County, KY alphabetically
| City/Town | Postal Code | Area Code |
| Confederate, KY | 42038 | 270 |
| Eddyville, KY | 42038 | 270 |
| Kuttawa, KY | 42055 | 270 |
| Lamasco, KY | 42038 | 270 |
| Overlook, KY | 42038 | 270 |
| Suwanee, KY | 42055 | 270 |