Founded in Apr 1, 1851, Noble County is one of 88 counties in the state of Ohio. Historically, Noble County was formed from Monroe, Washington, Morgan, and Guernsey Counties. The city of Caldwell is the county seat. With FIPS code of 121, Noble County has a population of 14,176 and area of 399.00 square miles (1,033 km2).
List of all cities in Noble County, OH alphabetically
| City/Town | Postal Code | Area Code |
| Ava, OH | 43711 | 740 |
| Belle Valley, OH | 43717 | 740 |
| Caldwell, OH | 43724 | 740 |
| Dexter City, OH | 45727 | 740 |
| Sarahsville, OH | 43779 | 740 |
| Summerfield, OH | 43788 | 740 |