13 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Olive | 1 | 5,848 | 5,719 | -0.36% | 212 | 28 | Township |
| Noble | 2 | 1,974 | 1,983 | -0.65% | 66 | 30 | Township |
| Caldwell | 3 | 1,909 | 1,678 | 2.47% | 2,147 | 1 | Village |
| Center | 4 | 1,069 | 1,078 | -0.56% | 38 | 28 | Township |
| Enoch | 5 | 425 | 427 | -0.7% | 16 | 26 | Township |
| Seneca | 6 | 411 | 411 | -0.48% | 17 | 24 | Township |
| Sharon | 7 | 340 | 343 | -0.87% | 12 | 27 | Township |
| Stock | 8 | 337 | 334 | -0.59% | 14 | 25 | Township |
| Elk | 9 | 282 | 276 | -0.35% | 10 | 29 | Township |
| Summerfield | 10 | 242 | 242 | 0% | 652 | 0 | Village |
| Belle Valley | 11 | 198 | 200 | -0.5% | 486 | 0 | Village |
| Sarahsville | 12 | 150 | 150 | 0% | 888 | 0 | Village |
| Dexter City | 13 | 82 | 84 | -1.2% | 491 | 0 | Village |
Olive is the largest city in Noble County, with a population of 5,848.
Dexter City is the smallest city in Noble County, with a population of 82.
There are 13 cities in Noble County, Ohio.