| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Platte City | 1 | 4,930 | 4,779 | 0.39% | 1,243 | 4 | City |
| Riverside | 2 | 4,701 | 4,014 | 2.62% | 851 | 6 | City |
| Weatherby Lake | 3 | 2,150 | 2,085 | 0.51% | 2,089 | 1 | City |
| Weston | 4 | 1,874 | 1,758 | 1.02% | 494 | 4 | City |
| Ferrelview | 5 | 658 | 645 | 0.3% | 5,928 | 0 | Village |
| Edgerton | 6 | 609 | 600 | 0.33% | 540 | 1 | City |
| Dearborn | 7 | 523 | 485 | 0.97% | 639 | 1 | City |
| Camden Point | 8 | 474 | 471 | 0% | 741 | 1 | City |
| Tracy | 9 | 355 | 301 | 2.9% | 866 | 0 | City |
| Farley | 10 | 259 | 259 | 0% | 224 | 1 | Village |
| Iatan | 11 | 44 | 42 | 0% | 202 | 0 | Village |
Platte City is the largest city in Platte County, with a population of 4,930.
Iatan is the smallest city in Platte County, with a population of 44.
There are 11 cities in Platte County, Missouri.