| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Ortonville | 1 | 1,955 | 2,023 | -0.61% | 466 | 4 | City |
| Graceville | 2 | 505 | 521 | -0.59% | 872 | 1 | City |
| Clinton | 3 | 366 | 383 | -0.81% | 382 | 1 | City |
| Beardsley | 4 | 205 | 214 | -0.97% | 436 | 0 | City |
| Odessa | 5 | 101 | 104 | -0.98% | 105 | 1 | City |
| Correll | 6 | 26 | 28 | -3.7% | 68 | 0 | City |
| Johnson | 7 | 22 | 24 | -4.35% | 71 | 0 | City |
| Barry | 8 | 14 | 14 | 0% | 55 | 0 | City |
Ortonville is the largest city in Big Stone County, with a population of 1,955.
Barry is the smallest city in Big Stone County, with a population of 14.
There are 8 cities in Big Stone County, Minnesota.