8 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Monroe City | 1 | 2,727 | 2,664 | 0.41% | 903 | 3 | City |
| Paris | 2 | 1,188 | 1,154 | 0.51% | 941 | 1 | City |
| Madison | 3 | 594 | 604 | -0.67% | 17 | 35 | Township |
| Madison | 4 | 539 | 520 | 0.56% | 1,203 | 0 | City |
| Madison | 5 | 416 | 423 | -0.95% | 11 | 38 | Township |
| Madison | 6 | 239 | 249 | -1.24% | 6 | 41 | Township |
| Holliday | 7 | 119 | 115 | 0.85% | 456 | 0 | Village |
| Stoutsville | 8 | 37 | 36 | 0% | 45 | 1 | Village |
Monroe City is the largest city in Monroe County, with a population of 2,727.
Stoutsville is the smallest city in Monroe County, with a population of 37.
There are 8 cities in Monroe County, Missouri.