| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Osage | 1 | 3,531 | 3,633 | -0.59% | 1,575 | 2 | City |
| St. Ansgar | 2 | 1,167 | 1,169 | -0.09% | 1,072 | 1 | City |
| Stacyville | 3 | 430 | 456 | -1.15% | 835 | 1 | City |
| McIntire | 4 | 117 | 113 | 0% | 116 | 1 | City |
| Carpenter | 5 | 92 | 88 | 0% | 262 | 0 | City |
| Orchard | 6 | 65 | 62 | 0% | 644 | 0 | City |
Osage is the largest city in Mitchell County, with a population of 3,531.
Orchard is the smallest city in Mitchell County, with a population of 65.
There are 6 cities in Mitchell County, Iowa.