12 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Cameron | 1 | 6,913 | 8,519 | -5.97% | 1,007 | 7 | City |
| Cameron | 2 | 6,913 | 9,106 | -5.97% | 1,007 | 7 | City |
| Lathrop | 3 | 2,276 | 2,266 | 0.04% | 543 | 4 | City |
| Lathrop | 4 | 2,276 | 2,269 | 0.04% | 543 | 4 | City |
| Plattsburg | 5 | 2,263 | 2,224 | 0.31% | 628 | 4 | City |
| Plattsburg | 6 | 2,263 | 2,227 | 0.31% | 628 | 4 | City |
| Gower | 7 | 1,529 | 1,537 | -0.13% | 1,511 | 1 | City |
| Gower | 8 | 1,529 | 1,537 | -0.13% | 1,511 | 1 | City |
| Trimble | 9 | 674 | 572 | 3.06% | 1,127 | 1 | City |
| Trimble | 10 | 674 | 574 | 3.06% | 1,127 | 1 | City |
| Turney | 11 | 124 | 118 | 0.81% | 267 | 0 | Village |
| Turney | 12 | 124 | 118 | 0.81% | 267 | 0 | Village |
Cameron is the largest city in Clinton County, with a population of 6,913.
Turney is the smallest city in Clinton County, with a population of 124.
There are 12 cities in Clinton County, Missouri.