9 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Waverly | 1 | 10,661 | 10,411 | 0.47% | 947 | 11.26 | City |
| Sumner | 2 | 2,033 | 2,027 | 0.05% | 827 | 2.46 | City |
| Denver | 3 | 1,962 | 1,921 | 0.41% | 1,154 | 1.70 | City |
| Tripoli | 4 | 1,208 | 1,192 | 0.25% | 868 | 1.39 | City |
| Janesville | 5 | 1,057 | 1,041 | 0.29% | 760 | 1.39 | City |
| Readlyn | 6 | 866 | 850 | 0.35% | 2,632 | 0.33 | City |
| Plainfield | 7 | 394 | 394 | 0% | 1,173 | 0.34 | City |
| Frederika | 8 | 207 | 204 | 0.48% | 564 | 0.37 | City |
| Bassett | 9 | 41 | 43 | 0% | 105 | 0.39 | City |
Waverly is the largest city in Bremer County, with a population of 10,661.
Bassett is the smallest city in Bremer County.
There are 9 cities in Bremer County, Iowa.