| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Owensville | 1 | 2,798 | 2,807 | -0.14% | 1,077 | 3 | City |
| Hermann | 2 | 2,224 | 2,183 | 0.14% | 880 | 3 | City |
| Bland | 3 | 503 | 509 | -0.4% | 780 | 1 | City |
| Rosebud | 4 | 397 | 391 | 0.25% | 456 | 1 | City |
| Gasconade | 5 | 167 | 170 | -0.6% | 823 | 0 | City |
| Morrison | 6 | 93 | 95 | -1.06% | 205 | 0 | City |
| McKittrick | 7 | 80 | 79 | 0% | 164 | 0 | Town |
Owensville is the largest city in Gasconade County, with a population of 2,798.
McKittrick is the smallest city in Gasconade County, with a population of 80.
There are 7 cities in Gasconade County, Missouri.