Founded in Mar 1, 1816, Jackson County is one of 88 counties in the state of Ohio. Historically, Jackson County was formed from Scioto, Gallia, Athens, and Ross Counties. The city of Jackson is the county seat. With FIPS code of 79, Jackson County has a population of 32,511 and area of 420.28 square miles (1,089 km2).
List of all cities in Jackson County, OH alphabetically
| City/Town | Postal Code | Area Code |
| Coalton, OH | 45621 | 740 |
| Jackson, OH | 45640 | 740 |
| Oak Hill, OH | 45656 | 740 |
| Wellston, OH | 45692 | 740 |