22 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Garnett | 1 | 3,168 | 3,240 | -0.44% | 1,028 | 3.08 | City |
| Greeley township | 2 | 1,035 | 1,018 | 0.68% | 29 | 35.69 | Township |
| Greeley township | 3 | 751 | 759 | -0.13% | 26 | 29.24 | Township |
| Ozark township | 4 | 555 | 548 | 0.73% | 16 | 35.63 | Township |
| Jackson township | 5 | 493 | 485 | 0.41% | 15 | 33.88 | Township |
| Centerville township | 6 | 479 | 456 | 1.05% | 6 | 79.05 | Township |
| Centerville township | 7 | 463 | 489 | -1.28% | 10 | 47.58 | Township |
| Reeder township | 8 | 460 | 448 | 0.88% | 6 | 72.02 | Township |
| Monroe township | 9 | 388 | 378 | 0.78% | 14 | 28.42 | Township |
| Colony | 10 | 374 | 381 | -0.27% | 773 | 0.48 | City |
| Westphalia township | 11 | 367 | 355 | 1.1% | 7 | 51.40 | Township |
| Rich township | 12 | 353 | 342 | 1.15% | 7 | 53.85 | Township |
| Welda township | 13 | 307 | 293 | 1.32% | 7 | 44.43 | Township |
| Putnam township | 14 | 297 | 286 | 1.02% | 9 | 33.42 | Township |
| Greeley | 15 | 276 | 271 | 0.36% | 802 | 0.34 | City |
| Lone Elm township | 16 | 226 | 221 | 0.44% | 5 | 45.96 | Township |
| Welda | 17 | 172 | 100 | 1.78% | 186 | 0.93 | CDP |
| Westphalia | 18 | 130 | 129 | 0% | 657 | 0.20 | City |
| Indian Creek township | 19 | 126 | 125 | 0% | 3 | 48.12 | Township |
| Kincaid | 20 | 107 | 106 | 0% | 214 | 0.50 | City |
| Mont Ida | 21 | 35 | 34 | 6.06% | 146 | 0.24 | CDP |
| Harris | 22 | 14 | 8 | 7.69% | 40 | 0.35 | CDP |
Garnett is the largest city in Anderson County, with a population of 3,168.
Harris is the smallest city in Anderson County.
There are 22 cities in Anderson County, Kansas.