12 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Clinton | 1 | 24,102 | 24,444 | -0.28% | 677 | 35.60 | City |
| DeWitt | 2 | 5,633 | 5,517 | 0.41% | 905 | 6.22 | City |
| Camanche | 3 | 4,539 | 4,571 | -0.13% | 511 | 8.88 | City |
| Wheatland | 4 | 755 | 774 | -0.53% | 1,315 | 0.57 | City |
| Grand Mound | 5 | 604 | 618 | -0.49% | 323 | 1.87 | City |
| Delmar | 6 | 540 | 544 | -0.18% | 707 | 0.76 | City |
| Lost Nation | 7 | 417 | 431 | -0.71% | 552 | 0.76 | City |
| Charlotte | 8 | 388 | 390 | 0% | 680 | 0.57 | City |
| Calamus | 9 | 347 | 354 | -0.29% | 704 | 0.49 | City |
| Goose Lake | 10 | 252 | 249 | 0.4% | 761 | 0.33 | City |
| Low Moor | 11 | 237 | 246 | -0.84% | 435 | 0.55 | City |
| Andover | 12 | 106 | 108 | 0% | 592 | 0.18 | City |
Clinton is the largest city in Clinton County, with a population of 24,102.
Andover is the smallest city in Clinton County.
There are 12 cities in Clinton County, Iowa.