14 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Waukee | 1 | 39,446 | 24,368 | 6.8% | 1,810 | 22 | City |
| Perry | 2 | 8,134 | 7,869 | 0.54% | 1,404 | 6 | City |
| Adel | 3 | 7,055 | 6,179 | 2.11% | 1,308 | 5 | City |
| Granger | 4 | 2,276 | 1,732 | 4.16% | 852 | 3 | City |
| Dallas Center | 5 | 2,035 | 1,909 | 1.04% | 376 | 5 | City |
| Van Meter | 6 | 2,013 | 1,493 | 4.52% | 460 | 4 | City |
| Woodward | 7 | 1,400 | 1,349 | 0.65% | 383 | 4 | City |
| De Soto | 8 | 944 | 923 | 0.43% | 501 | 2 | City |
| Redfield | 9 | 713 | 731 | -0.42% | 523 | 1 | City |
| Dexter | 10 | 626 | 641 | -0.32% | 500 | 1 | City |
| Minburn | 11 | 313 | 324 | -0.63% | 1,227 | 0 | City |
| Linden | 12 | 209 | 200 | 0.97% | 267 | 1 | City |
| Bouton | 13 | 123 | 129 | -0.81% | 1,150 | 0 | City |
| Dawson | 14 | 109 | 112 | 0% | 220 | 0 | City |
Waukee is the largest city in Dallas County, with a population of 39,446.
Dawson is the smallest city in Dallas County, with a population of 109.
There are 14 cities in Dallas County, Iowa.