7 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Delta | 1 | 9,956 | 9,063 | 1.83% | 750 | 13.27 | City |
| Orchard City | 2 | 3,317 | 3,151 | 1% | 288 | 11.52 | Town |
| Cedaredge | 3 | 2,492 | 2,287 | 1.67% | 1,271 | 1.96 | Town |
| Paonia | 4 | 1,464 | 1,451 | 0.21% | 1,766 | 0.83 | Town |
| Hotchkiss | 5 | 959 | 883 | 1.59% | 1,036 | 0.93 | Town |
| Crawford | 6 | 413 | 398 | 0.73% | 1,645 | 0.25 | Town |
| Lazear | 7 | 178 | 245 | 7.23% | 111 | 1.60 | CDP |
Delta is the largest city in Delta County, with a population of 9,956.
Lazear is the smallest city in Delta County.
There are 7 cities in Delta County, Colorado.