4 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Waseca | 1 | 8,991 | 9,218 | -0.42% | 2,093 | 4 | City |
| Janesville | 2 | 2,468 | 2,450 | 0.12% | 1,606 | 2 | City |
| New Richland | 3 | 1,170 | 1,226 | -0.76% | 1,980 | 1 | City |
| Waldorf | 4 | 202 | 205 | 0% | 533 | 0 | City |
Waseca is the largest city in Waseca County, with a population of 8,991.
Waldorf is the smallest city in Waseca County, with a population of 202.
There are 4 cities in Waseca County, Minnesota.