5 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Unionville | 1 | 1,637 | 1,729 | -0.91% | 820 | 2 | City |
| Worthington | 2 | 57 | 60 | 0% | 452 | 0 | Village |
| Lucerne | 3 | 53 | 56 | 0% | 212 | 0 | Village |
| Livonia | 4 | 51 | 53 | 0% | 192 | 0 | Village |
| Powersville | 5 | 43 | 43 | 0% | 76 | 1 | Village |
Unionville is the largest city in Putnam County, with a population of 1,637.
Powersville is the smallest city in Putnam County, with a population of 43.
There are 5 cities in Putnam County, Missouri.