31 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Wamego | 1 | 5,885 | 5,684 | 0.74% | 302 | 19 | Township |
| Blue | 2 | 5,564 | 4,961 | 1.81% | 128 | 43 | Township |
| St. George | 3 | 5,173 | 4,571 | 1.89% | 155 | 33 | Township |
| Wamego | 4 | 4,912 | 4,840 | 0.24% | 1,863 | 3 | City |
| St. Marys | 5 | 4,063 | 3,884 | 0.87% | 107 | 38 | Township |
| St. Marys | 6 | 2,795 | 2,761 | 0.22% | 2,373 | 1 | City |
| St. George | 7 | 1,194 | 1,062 | 1.88% | 1,851 | 1 | City |
| Louisville | 8 | 1,146 | 1,024 | 1.78% | 31 | 36 | Township |
| Mill Creek | 9 | 1,014 | 976 | 0.7% | 24 | 42 | Township |
| Westmoreland | 10 | 734 | 727 | 0.14% | 1,492 | 0 | City |
| Pottawatomie | 11 | 720 | 661 | 1.41% | 12 | 60 | Township |
| Rock Creek | 12 | 715 | 688 | 0.85% | 20 | 36 | Township |
| Onaga | 13 | 681 | 680 | 0% | 1,038 | 1 | City |
| Emmett | 14 | 502 | 437 | 1.83% | 17 | 30 | Township |
| Blue Valley | 15 | 432 | 398 | 1.65% | 10 | 44 | Township |
| Belvue | 16 | 409 | 357 | 0.99% | 11 | 36 | Township |
| Shannon | 17 | 288 | 254 | 1.77% | 7 | 40 | Township |
| Grant | 18 | 257 | 232 | 1.58% | 9 | 30 | Township |
| Lone Tree | 19 | 247 | 220 | 2.07% | 7 | 36 | Township |
| Union | 20 | 243 | 217 | 2.1% | 7 | 36 | Township |
| Olsburg | 21 | 229 | 220 | 0.88% | 946 | 0 | City |
| Belvue | 22 | 220 | 178 | 3.29% | 1,789 | 0 | City |
| Emmett | 23 | 171 | 168 | 0.59% | 877 | 0 | City |
| Louisville | 24 | 160 | 136 | 2.56% | 321 | 0 | City |
| Clear Creek | 25 | 155 | 133 | 3.33% | 4 | 36 | Township |
| Havensville | 26 | 134 | 122 | 1.52% | 924 | 0 | City |
| Sherman | 27 | 131 | 114 | 2.34% | 4 | 36 | Township |
| Center | 28 | 130 | 115 | 2.36% | 4 | 30 | Township |
| Vienna | 29 | 94 | 88 | 0% | 3 | 30 | Township |
| St. Clere | 30 | 62 | 56 | 0% | 2 | 30 | Township |
| Spring Creek | 31 | 55 | 51 | 0% | 1 | 40 | Township |
Wamego is the largest city in Pottawatomie County, with a population of 5,885.
Spring Creek is the smallest city in Pottawatomie County, with a population of 55.
There are 31 cities in Pottawatomie County, Kansas.