10 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Omaha | 1 | 487,506 | 492,783 | -0.18% | 3,410 | 143 | City |
| Ralston | 2 | 6,422 | 6,485 | -0.16% | 3,930 | 2 | City |
| Valley | 3 | 3,480 | 3,047 | 2.11% | 654 | 5 | City |
| Bennington | 4 | 1,962 | 2,022 | -0.51% | 2,187 | 1 | City |
| Omaha | 5 | 1,043 | 1,029 | 0.97% | 23 | 45 | Township |
| Waterloo | 6 | 915 | 939 | -0.44% | 1,138 | 1 | Village |
| Boys Town | 7 | 763 | 420 | 8.07% | 840 | 1 | Village |
| Elkhorn | 8 | 333 | 340 | 0% | 11 | 31 | Township |
| Elkhorn | 9 | 240 | 244 | -0.41% | 7 | 36 | Township |
| Valley | 10 | 141 | 146 | -0.7% | 4 | 36 | Township |
Omaha is the largest city in Douglas County, with a population of 487,506.
Valley is the smallest city in Douglas County, with a population of 141.
There are 10 cities in Douglas County, Nebraska.