11 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Columbus | 1 | 3,975 | 3,788 | 0.94% | 1,335 | 3 | City |
| Columbus | 2 | 3,975 | 3,790 | 0.94% | 1,335 | 3 | City |
| Eagle Lake | 3 | 3,570 | 3,446 | 0.71% | 1,218 | 3 | City |
| Eagle Lake | 4 | 3,570 | 3,444 | 0.71% | 1,218 | 3 | City |
| Weimar | 5 | 2,225 | 2,065 | 1.41% | 962 | 2 | City |
| Weimar | 6 | 2,225 | 2,068 | 1.41% | 962 | 2 | City |
| Garwood | 7 | 536 | 397 | 7.2% | 99 | 5 | CDP |
| Rock Island | 8 | 492 | 447 | 6.96% | 98 | 5 | CDP |
| Glidden | 9 | 440 | 547 | -3.08% | 442 | 1 | CDP |
| Nada | 10 | 284 | 145 | 7.17% | 43 | 7 | CDP |
| Sheridan | 11 | 235 | 595 | 7.31% | 44 | 5 | CDP |
Columbus is the largest city in Colorado County, with a population of 3,975.
Sheridan is the smallest city in Colorado County, with a population of 235.
There are 11 cities in Colorado County, Texas.