8 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Le Sueur | 1 | 4,244 | 4,201 | 0.17% | 816 | 5 | City |
| Montgomery | 2 | 3,674 | 3,263 | 1.91% | 1,461 | 3 | City |
| Le Center | 3 | 2,538 | 2,507 | 0.2% | 1,514 | 2 | City |
| Waterville | 4 | 1,772 | 1,744 | 0.28% | 1,051 | 2 | City |
| Elysian | 5 | 785 | 707 | 1.68% | 666 | 1 | City |
| Cleveland | 6 | 782 | 742 | 0.9% | 1,430 | 1 | City |
| Kasota | 7 | 720 | 714 | 0.14% | 580 | 1 | City |
| Heidelberg | 8 | 135 | 135 | 0% | 258 | 1 | City |
Le Sueur is the largest city in Le Sueur County, with a population of 4,244.
Heidelberg is the smallest city in Le Sueur County, with a population of 135.
There are 8 cities in Le Sueur County, Minnesota.