22 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Platte City | 1 | 4,888 | 4,780 | 0.43% | 1,232 | 4 | City |
| Platte City | 2 | 4,888 | 4,780 | 0.43% | 1,232 | 4 | City |
| Riverside | 3 | 4,619 | 4,011 | 2.69% | 836 | 6 | City |
| Riverside | 4 | 4,619 | 4,014 | 2.69% | 836 | 6 | City |
| Weatherby Lake | 5 | 2,136 | 2,076 | 0.52% | 2,076 | 1 | City |
| Weatherby Lake | 6 | 2,136 | 2,079 | 0.52% | 2,076 | 1 | City |
| Weston | 7 | 1,856 | 1,756 | 1.03% | 489 | 4 | City |
| Weston | 8 | 1,856 | 1,758 | 1.03% | 489 | 4 | City |
| Ferrelview | 9 | 654 | 646 | 0.15% | 5,892 | 0 | Village |
| Ferrelview | 10 | 654 | 646 | 0.15% | 5,892 | 0 | Village |
| Edgerton | 11 | 611 | 600 | 0.33% | 542 | 1 | City |
| Edgerton | 12 | 611 | 600 | 0.33% | 542 | 1 | City |
| Dearborn | 13 | 511 | 484 | 0.99% | 625 | 1 | City |
| Dearborn | 14 | 511 | 484 | 0.99% | 625 | 1 | City |
| Camden Point | 15 | 473 | 470 | 0% | 739 | 1 | City |
| Camden Point | 16 | 473 | 470 | 0% | 739 | 1 | City |
| Tracy | 17 | 329 | 269 | 3.13% | 802 | 0 | City |
| Tracy | 18 | 329 | 276 | 3.13% | 802 | 0 | City |
| Farley | 19 | 263 | 260 | 0% | 228 | 1 | Village |
| Farley | 20 | 263 | 260 | 0% | 228 | 1 | Village |
| Iatan | 21 | 43 | 41 | 0% | 197 | 0 | Village |
| Iatan | 22 | 43 | 41 | 0% | 197 | 0 | Village |
Platte City is the largest city in Platte County, with a population of 4,888.
Iatan is the smallest city in Platte County, with a population of 43.
There are 22 cities in Platte County, Missouri.