Founded in Feb 1, 1813, Harrison County is one of 88 counties in the state of Ohio. Historically, Harrison County was formed from Jefferson and Tuscarawas Counties. The city of Cadiz is the county seat. With FIPS code of 67, Harrison County has a population of 14,477 and area of 403.53 square miles (1,045 km2).
List of all cities in Harrison County, OH alphabetically
| City/Town | Postal Code | Area Code |
| Bowerston, OH | 44695 | 740 |
| Cadiz, OH | 43907 | 740 |
| Conotton, OH | 44695 | 740 |
| Deersville, OH | 44693 | 740 |
| Freeport, OH | 43973 | 740 |
| Harrisville, OH | 43974 | 740 |
| Hopedale, OH | 43976 | 740 |
| Jewett, OH | 43986 | 740 |
| Moorefield, OH | 43907 | 740 |
| New Athens, OH | 43981 | 740 |
| New Hagerstown, OH | 44695 | 740 |
| New Rumley, OH | 43984 | 740 |
| Scio, OH | 43988 | 740 |
| Short Creek, OH | 43907 | 740 |
| Tippecanoe, OH | 44699 | 740 |