| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Zanesville | 1 | 25,155 | 24,789 | 0.07% | 2,127 | 12 | City |
| New Concord | 2 | 2,460 | 2,359 | -0.53% | 1,361 | 2 | Village |
| South Zanesville | 3 | 1,908 | 1,891 | 0.05% | 2,373 | 1 | Village |
| Roseville | 4 | 1,748 | 1,748 | -0.17% | 2,544 | 1 | Village |
| Dresden | 5 | 1,643 | 1,655 | -0.18% | 1,286 | 1 | Village |
| Frazeysburg | 6 | 1,354 | 1,352 | -0.15% | 1,318 | 1 | Village |
| Philo | 7 | 723 | 721 | -0.14% | 1,412 | 1 | Village |
| Adamsville | 8 | 140 | 140 | 0% | 2,593 | 0 | Village |
| Fultonham | 9 | 118 | 118 | 0% | 1,283 | 0 | Village |
| Norwich | 10 | 95 | 98 | -1.04% | 1,234 | 0 | Village |
Zanesville is the largest city in Muskingum County, with a population of 25,155.
Norwich is the smallest city in Muskingum County, with a population of 95.
There are 10 cities in Muskingum County, Ohio.