7 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Gaylord | 1 | 2,358 | 2,285 | 0.51% | 1,250 | 2 | City |
| Arlington | 2 | 2,353 | 2,236 | 0.86% | 1,462 | 2 | City |
| Winthrop | 3 | 1,334 | 1,327 | 0.08% | 1,046 | 1 | City |
| Henderson | 4 | 1,004 | 956 | 0.8% | 935 | 1 | City |
| Gibbon | 5 | 789 | 785 | 0.13% | 1,188 | 1 | City |
| Green Isle | 6 | 747 | 588 | 3.75% | 730 | 1 | City |
| New Auburn | 7 | 415 | 409 | 0.24% | 609 | 1 | City |
Gaylord is the largest city in Sibley County, with a population of 2,358.
New Auburn is the smallest city in Sibley County, with a population of 415.
There are 7 cities in Sibley County, Minnesota.