| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Waukee | 1 | 36,825 | 24,185 | 5.55% | 1,690 | 22 | City |
| Perry | 2 | 8,298 | 7,881 | 1.1% | 1,432 | 6 | City |
| Adel | 3 | 7,284 | 6,194 | 2.62% | 1,351 | 5 | City |
| Granger | 4 | 2,278 | 1,737 | 4.54% | 853 | 3 | City |
| Van Meter | 5 | 2,075 | 1,496 | 4.9% | 474 | 4 | City |
| Dallas Center | 6 | 2,073 | 1,909 | 1.52% | 383 | 5 | City |
| Woodward | 7 | 1,440 | 1,353 | 0.98% | 394 | 4 | City |
| De Soto | 8 | 984 | 923 | 0.82% | 522 | 2 | City |
| Redfield | 9 | 742 | 736 | 0.13% | 544 | 1 | City |
| Dexter | 10 | 641 | 643 | 0% | 512 | 1 | City |
| Minburn | 11 | 323 | 326 | 0% | 1,267 | 0 | City |
| Linden | 12 | 212 | 201 | 0.95% | 271 | 1 | City |
| Bouton | 13 | 126 | 128 | -0.79% | 1,178 | 0 | City |
| Dawson | 14 | 114 | 113 | 0% | 230 | 0 | City |
Waukee is the largest city in Dallas County, with a population of 36,825.
Dawson is the smallest city in Dallas County, with a population of 114.
There are 14 cities in Dallas County, Iowa.