20 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Tipton | 1 | 3,033 | 3,165 | -0.85% | 1,499 | 2 | City |
| Tipton | 2 | 3,033 | 3,162 | -0.85% | 1,499 | 2 | City |
| West Branch | 3 | 2,967 | 2,505 | 3.16% | 1,154 | 3 | City |
| West Branch | 4 | 2,967 | 2,509 | 3.16% | 1,154 | 3 | City |
| Durant | 5 | 1,778 | 1,873 | -1.11% | 1,441 | 1 | City |
| Durant | 6 | 1,778 | 1,875 | -1.11% | 1,441 | 1 | City |
| Clarence | 7 | 979 | 1,040 | -1.21% | 1,286 | 1 | City |
| Clarence | 8 | 979 | 1,039 | -1.21% | 1,286 | 1 | City |
| Mechanicsville | 9 | 962 | 1,020 | -1.23% | 1,167 | 1 | City |
| Mechanicsville | 10 | 962 | 1,019 | -1.23% | 1,167 | 1 | City |
| Lowden | 11 | 758 | 802 | -1.17% | 706 | 1 | City |
| Lowden | 12 | 758 | 801 | -1.17% | 706 | 1 | City |
| Stanwood | 13 | 605 | 640 | -1.14% | 760 | 1 | City |
| Stanwood | 14 | 605 | 640 | -1.14% | 760 | 1 | City |
| Bennett | 15 | 325 | 347 | -1.52% | 1,570 | 0 | City |
| Bennett | 16 | 325 | 347 | -1.52% | 1,570 | 0 | City |
| Downey | 17 | 101 | 87 | 7.45% | 150 | 1 | CDP |
| Toronto | 18 | 100 | 102 | -0.99% | 549 | 0 | City |
| Toronto | 19 | 100 | 102 | -0.99% | 549 | 0 | City |
| Rochester | 20 | 27 | 97 | -20.59% | 28 | 1 | CDP |
Tipton is the largest city in Cedar County, with a population of 3,033.
Rochester is the smallest city in Cedar County, with a population of 27.
There are 20 cities in Cedar County, Iowa.