| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Minneapolis | 1 | 1,904 | 1,938 | -0.16% | 1,039 | 2 | City |
| Bennington | 2 | 643 | 620 | 0.94% | 1,531 | 0 | City |
| Delphos | 3 | 293 | 300 | -0.34% | 494 | 1 | City |
| Tescott | 4 | 259 | 264 | -0.38% | 671 | 0 | City |
Minneapolis is the largest city in Ottawa County, with a population of 1,904.
Tescott is the smallest city in Ottawa County, with a population of 259.
There are 4 cities in Ottawa County, Kansas.