28 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Waukee | 1 | 36,933 | 23,949 | 7.3% | 1,695 | 22 | City |
| Waukee | 2 | 36,933 | 24,368 | 7.3% | 1,695 | 22 | City |
| Perry | 3 | 8,090 | 7,844 | 0.55% | 1,396 | 6 | City |
| Perry | 4 | 8,090 | 7,869 | 0.55% | 1,396 | 6 | City |
| Adel | 5 | 6,909 | 6,158 | 2.16% | 1,281 | 5 | City |
| Adel | 6 | 6,909 | 6,179 | 2.16% | 1,281 | 5 | City |
| Granger | 7 | 2,185 | 1,706 | 4.3% | 1,310 | 2 | City |
| Granger | 8 | 2,185 | 1,732 | 4.3% | 1,310 | 2 | City |
| Dallas Center | 9 | 2,014 | 1,903 | 1.05% | 372 | 5 | City |
| Dallas Center | 10 | 2,014 | 1,909 | 1.05% | 372 | 5 | City |
| Van Meter | 11 | 1,926 | 1,482 | 4.67% | 440 | 4 | City |
| Van Meter | 12 | 1,926 | 1,493 | 4.67% | 440 | 4 | City |
| Woodward | 13 | 1,391 | 1,347 | 0.58% | 381 | 4 | City |
| Woodward | 14 | 1,391 | 1,349 | 0.58% | 381 | 4 | City |
| De Soto | 15 | 940 | 919 | 0.32% | 499 | 2 | City |
| De Soto | 16 | 940 | 923 | 0.32% | 499 | 2 | City |
| Redfield | 17 | 716 | 730 | -0.42% | 525 | 1 | City |
| Redfield | 18 | 716 | 731 | -0.42% | 525 | 1 | City |
| Dexter | 19 | 628 | 640 | -0.48% | 502 | 1 | City |
| Dexter | 20 | 628 | 641 | -0.48% | 502 | 1 | City |
| Minburn | 21 | 315 | 324 | -0.63% | 1,235 | 0 | City |
| Minburn | 22 | 315 | 324 | -0.63% | 1,235 | 0 | City |
| Linden | 23 | 207 | 200 | 0.49% | 264 | 1 | City |
| Linden | 24 | 207 | 200 | 0.49% | 264 | 1 | City |
| Bouton | 25 | 124 | 129 | -0.8% | 1,159 | 0 | City |
| Bouton | 26 | 124 | 129 | -0.8% | 1,159 | 0 | City |
| Dawson | 27 | 109 | 112 | -0.91% | 220 | 0 | City |
| Dawson | 28 | 109 | 112 | -0.91% | 220 | 0 | City |
Waukee is the largest city in Dallas County, with a population of 36,933.
Dawson is the smallest city in Dallas County, with a population of 109.
There are 28 cities in Dallas County, Iowa.