Founded in Mar 1, 1804, Muskingum County is one of 88 counties in the state of Ohio. Historically, Muskingum County was formed from Washington and Fairfield Counties. The city of Zanesville is the county seat. With FIPS code of 119, Muskingum County has a population of 86,408 and area of 664.63 square miles (1,721 km2).
List of all cities in Muskingum County, OH alphabetically
| City/Town | Postal Code | Area Code |
| Adams Mills, OH | 43821 | 740 |
| Adamsville, OH | 43802 | 740 |
| Blue Rock, OH | 43720 | 740 |
| Chandlersville, OH | 43727 | 740 |
| Dresden, OH | 43821 | 740 |
| Duncan Falls, OH | 43734 | 740 |
| East Fultonham, OH | 43735 | 740 |
| Frazeysburg, OH | 43822 | 740 |
| Fultonham, OH | 43738 | 740 |
| Hopewell, OH | 43746 | 740 |
| Nashport, OH | 43830 | 740 |
| New Concord, OH | 43762 | 740 |
| Norwich, OH | 43767 | 740 |
| Philo, OH | 43771 | 740 |
| Roseville, OH | 43777 | 740 |
| Sonora, OH | 43701 | 740 |
| South Zanesville, OH | 43701 | 740 |
| 43702 | 740 | |
| Trinway, OH | 43842 | 740 |
| White Cottage, OH | 43791 | 740 |
| Zanesville, OH | 43701 | 740 |
| 43702 | 740 |