| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Davenport | 1 | 100,062 | 101,651 | -0.29% | 1,558 | 64 | City |
| Bettendorf | 2 | 40,963 | 39,120 | 0.62% | 1,923 | 21 | City |
| Eldridge | 3 | 7,005 | 6,722 | 0.73% | 718 | 10 | City |
| Le Claire | 4 | 4,753 | 4,708 | 0.25% | 1,021 | 5 | City |
| Blue Grass | 5 | 1,711 | 1,666 | 0.47% | 541 | 3 | City |
| Walcott | 6 | 1,528 | 1,545 | -0.13% | 491 | 3 | City |
| Buffalo | 7 | 1,142 | 1,171 | -0.35% | 169 | 7 | City |
| Princeton | 8 | 905 | 925 | -0.44% | 278 | 3 | City |
| Long Grove | 9 | 846 | 836 | 0.24% | 735 | 1 | City |
| Riverdale | 10 | 381 | 378 | 0% | 207 | 2 | City |
| Donahue | 11 | 335 | 332 | 0% | 944 | 0 | City |
| McCausland | 12 | 310 | 310 | 0% | 560 | 1 | City |
| Dixon | 13 | 204 | 203 | 0% | 1,632 | 0 | City |
| Panorama Park | 14 | 144 | 143 | 0% | 2,400 | 0 | City |
| New Liberty | 15 | 134 | 135 | 0% | 1,411 | 0 | City |
Davenport is the largest city in Scott County, with a population of 100,062.
New Liberty is the smallest city in Scott County, with a population of 134.
There are 15 cities in Scott County, Iowa.