8 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Algoma | 1 | 3,221 | 3,245 | -0.15% | 1,311 | 2 | City |
| Algoma | 2 | 3,221 | 3,244 | -0.15% | 1,311 | 2 | City |
| Kewaunee | 3 | 2,804 | 2,825 | -0.14% | 794 | 4 | City |
| Kewaunee | 4 | 2,804 | 2,822 | -0.14% | 794 | 4 | City |
| Luxemburg | 5 | 2,783 | 2,688 | 0.65% | 1,108 | 3 | Village |
| Luxemburg | 6 | 2,783 | 2,690 | 0.65% | 1,108 | 3 | Village |
| Casco | 7 | 697 | 628 | 2.05% | 1,047 | 1 | Village |
| Casco | 8 | 697 | 627 | 2.05% | 1,047 | 1 | Village |
Algoma is the largest city in Kewaunee County, with a population of 3,221.
Casco is the smallest city in Kewaunee County, with a population of 697.
There are 8 cities in Kewaunee County, Wisconsin.