12 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Neoga | 1 | 2,771 | 2,775 | 0.43% | 51 | 55 | Township |
| Greenup | 2 | 2,246 | 2,263 | 0.27% | 47 | 47 | Township |
| Sumpter | 3 | 2,005 | 2,020 | 0.3% | 44 | 46 | Township |
| Neoga | 4 | 1,376 | 1,396 | -0.22% | 990 | 1 | City |
| Greenup | 5 | 1,337 | 1,367 | -0.37% | 764 | 2 | Village |
| Spring Point | 6 | 1,328 | 1,335 | 0.38% | 24 | 56 | Township |
| Toledo | 7 | 1,133 | 1,157 | -0.35% | 1,276 | 1 | Village |
| Woodbury | 8 | 547 | 552 | 0.18% | 24 | 23 | Township |
| Cottonwood | 9 | 480 | 483 | 0.42% | 15 | 33 | Township |
| Crooked Creek | 10 | 367 | 371 | 0.27% | 11 | 34 | Township |
| Jewett | 11 | 192 | 197 | -0.52% | 191 | 1 | Village |
| Rose Hill | 12 | 82 | 85 | 0% | 129 | 1 | Village |
Neoga is the largest city in Cumberland County, with a population of 2,771.
Rose Hill is the smallest city in Cumberland County, with a population of 82.
There are 12 cities in Cumberland County, Illinois.