14 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Olive township | 1 | 5,819 | 5,714 | -0.55% | 211 | 27.55 | Township |
| Devola | 2 | 2,673 | 2,593 | 0.04% | 521 | 5.13 | CDP |
| Noble township | 3 | 2,001 | 1,979 | 0.2% | 67 | 29.82 | Township |
| Caldwell | 4 | 1,997 | 1,677 | 3.31% | 2,246 | 0.89 | Village |
| Center township | 5 | 1,082 | 1,075 | 0.19% | 38 | 28.27 | Township |
| Enoch township | 6 | 432 | 425 | 0.47% | 16 | 26.26 | Township |
| Seneca township | 7 | 416 | 411 | 0.24% | 18 | 23.61 | Township |
| Sharon township | 8 | 340 | 340 | -0.29% | 12 | 27.44 | Township |
| Stock township | 9 | 338 | 332 | 0.3% | 14 | 24.60 | Township |
| Elk township | 10 | 287 | 280 | 0.35% | 10 | 28.99 | Township |
| Summerfield | 11 | 243 | 243 | 0% | 655 | 0.37 | Village |
| Belle Valley | 12 | 197 | 201 | -0.51% | 484 | 0.41 | Village |
| Sarahsville | 13 | 151 | 150 | 0% | 893 | 0.17 | Village |
| Dexter City | 14 | 78 | 80 | 0% | 467 | 0.17 | Village |
Olive township is the largest city in Noble County, with a population of 5,819.
Dexter City is the smallest city in Noble County.
There are 14 cities in Noble County, Ohio.