11 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Platte City | 1 | 4,910 | 4,780 | 0.45% | 1,238 | 4 | City |
| Riverside | 2 | 4,740 | 4,014 | 2.62% | 858 | 6 | City |
| Weatherby Lake | 3 | 2,148 | 2,079 | 0.56% | 2,087 | 1 | City |
| Weston | 4 | 1,876 | 1,758 | 1.08% | 494 | 4 | City |
| Ferrelview | 5 | 656 | 646 | 0.31% | 5,910 | 0 | Village |
| Edgerton | 6 | 613 | 600 | 0.33% | 543 | 1 | City |
| Dearborn | 7 | 517 | 484 | 1.17% | 632 | 1 | City |
| Camden Point | 8 | 474 | 470 | 0.21% | 741 | 1 | City |
| Tracy | 9 | 340 | 276 | 3.34% | 829 | 0 | City |
| Farley | 10 | 264 | 260 | 0.38% | 228 | 1 | Village |
| Iatan | 11 | 44 | 41 | 2.33% | 202 | 0 | Village |
Platte City is the largest city in Platte County, with a population of 4,910.
Iatan is the smallest city in Platte County, with a population of 44.
There are 11 cities in Platte County, Missouri.