11 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Platte City | 1 | 4,864 | 4,773 | 0.37% | 1,226 | 3.97 | City |
| Riverside | 2 | 4,686 | 4,013 | 2.97% | 848 | 5.53 | City |
| Weatherby Lake | 3 | 2,131 | 2,081 | 0.47% | 2,071 | 1.03 | City |
| Weston | 4 | 1,846 | 1,758 | 0.98% | 486 | 3.80 | City |
| Ferrelview | 5 | 651 | 648 | 0.15% | 5,865 | 0.11 | Village |
| Edgerton | 6 | 608 | 600 | 0.33% | 539 | 1.13 | City |
| Dearborn | 7 | 513 | 485 | 1.18% | 627 | 0.82 | City |
| Camden Point | 8 | 478 | 478 | 0% | 747 | 0.64 | City |
| Tracy | 9 | 341 | 275 | 3.96% | 832 | 0.41 | City |
| Farley | 10 | 266 | 265 | 0% | 230 | 1.16 | Village |
| Iatan | 11 | 43 | 40 | 2.38% | 197 | 0.22 | Village |
Platte City is the largest city in Platte County, with a population of 4,864.
Iatan is the smallest city in Platte County.
There are 11 cities in Platte County, Missouri.