32 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Wamego | 1 | 5,842 | 5,684 | 0.74% | 300 | 19 | Township |
| Blue | 2 | 5,465 | 4,961 | 1.84% | 126 | 43 | Township |
| St. George | 3 | 5,077 | 4,571 | 1.93% | 152 | 33 | Township |
| Wamego | 4 | 4,900 | 4,840 | 0.25% | 1,858 | 3 | City |
| St. Marys | 5 | 4,028 | 3,884 | 0.88% | 106 | 38 | Township |
| St. Marys | 6 | 2,789 | 2,761 | 0.18% | 2,368 | 1 | City |
| St. George | 7 | 1,172 | 1,062 | 1.91% | 1,817 | 1 | City |
| Louisville | 8 | 1,126 | 1,024 | 1.81% | 31 | 36 | Township |
| Mill Creek | 9 | 1,007 | 976 | 0.7% | 24 | 42 | Township |
| Westmoreland | 10 | 733 | 727 | 0.14% | 1,490 | 0 | City |
| Pottawatomie | 11 | 710 | 661 | 1.43% | 12 | 60 | Township |
| Rock Creek | 12 | 709 | 688 | 0.85% | 20 | 36 | Township |
| Onaga | 13 | 681 | 680 | 0% | 1,038 | 1 | City |
| Emmett | 14 | 493 | 437 | 1.86% | 17 | 30 | Township |
| Blue Valley | 15 | 425 | 398 | 1.67% | 10 | 44 | Township |
| Belvue | 16 | 405 | 357 | 1% | 11 | 36 | Township |
| Shannon | 17 | 283 | 254 | 1.8% | 7 | 40 | Township |
| Grant | 18 | 253 | 232 | 1.61% | 9 | 30 | Township |
| Lone Tree | 19 | 242 | 220 | 2.11% | 7 | 36 | Township |
| Union | 20 | 238 | 217 | 2.15% | 7 | 36 | Township |
| Olsburg | 21 | 227 | 220 | 0.44% | 938 | 0 | City |
| Belvue | 22 | 213 | 178 | 3.4% | 1,732 | 0 | City |
| Emmett | 23 | 170 | 168 | 0% | 872 | 0 | City |
| Louisville | 24 | 156 | 136 | 2.63% | 313 | 0 | City |
| Clear Creek | 25 | 150 | 133 | 3.45% | 4 | 36 | Township |
| Havensville | 26 | 132 | 122 | 1.54% | 910 | 0 | City |
| Sherman | 27 | 128 | 114 | 2.4% | 4 | 36 | Township |
| Center | 28 | 127 | 115 | 2.42% | 4 | 30 | Township |
| Vienna | 29 | 94 | 88 | 0% | 3 | 30 | Township |
| St. Clere | 30 | 62 | 56 | 0% | 2 | 30 | Township |
| Wabaunsee | 31 | 58 | 174 | 7.41% | 43 | 1 | CDP |
| Spring Creek | 32 | 55 | 51 | 0% | 1 | 40 | Township |
Wamego is the largest city in Pottawatomie County, with a population of 5,842.
Spring Creek is the smallest city in Pottawatomie County, with a population of 55.
There are 32 cities in Pottawatomie County, Kansas.