Founded in Aug 20, 1798, Ross County is one of 88 counties in the state of Ohio. Historically, Ross County was formed from Adams and Washington Counties. The city of Chillicothe is the county seat. With FIPS code of 141, Ross County has a population of 76,891 and area of 688.41 square miles (1,783 km2).
List of all cities in Ross County, OH alphabetically
| City/Town | Postal Code | Area Code |
| Adelphi, OH | 43101 | 740 |
| Bainbridge, OH | 45612 | 740 |
| Bourneville, OH | 45617 | 740 |
| Chillicothe, OH | 45601 | 740 |
| Clarksburg, OH | 43115 | 740 |
| Frankfort, OH | 45628 | 740 |
| Hallsville, OH | 45633 | 740 |
| Kingston, OH | 45644 | 740 |
| Londonderry, OH | 45647 | 740 |
| Lyndon, OH | 45681 | 937 |
| Richmond Dale, OH | 45673 | 740 |
| South Salem, OH | 45681 | 937 |