26 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Parker | 1 | 1,319 | 1,199 | 1.85% | 1,125 | 1.17 | City |
| Centerville | 2 | 979 | 924 | 1.14% | 1,360 | 0.72 | City |
| Marion | 3 | 894 | 843 | 1.13% | 1,030 | 0.87 | City |
| Viborg | 4 | 850 | 809 | 0.95% | 1,638 | 0.52 | City |
| Home township | 5 | 419 | 391 | 1.45% | 15 | 27.98 | Township |
| Hurley | 6 | 390 | 377 | 0.78% | 633 | 0.62 | City |
| Germantown township | 7 | 367 | 343 | 1.38% | 10 | 35.55 | Township |
| Chancellor | 8 | 324 | 303 | 1.25% | 1,473 | 0.22 | Town |
| Parker township | 9 | 285 | 263 | 1.79% | 8 | 34.67 | Township |
| Middleton township | 10 | 274 | 252 | 1.86% | 8 | 35.45 | Township |
| Swan Lake township | 11 | 272 | 256 | 1.12% | 8 | 35.25 | Township |
| Spring Valley township | 12 | 239 | 231 | 0.42% | 7 | 35.74 | Township |
| Childstown township | 13 | 225 | 207 | 1.81% | 6 | 36.41 | Township |
| Turner township | 14 | 204 | 187 | 2% | 6 | 35.61 | Township |
| Daneville township | 15 | 200 | 183 | 2.04% | 6 | 35.67 | Township |
| Centerville township | 16 | 194 | 177 | 2.11% | 6 | 35.19 | Township |
| Marion township | 17 | 189 | 180 | 0.53% | 5 | 35.01 | Township |
| Brothersfield township | 18 | 182 | 173 | 0.55% | 6 | 28.45 | Township |
| Rosefield township | 19 | 181 | 170 | 1.12% | 5 | 36.37 | Township |
| Hurley township | 20 | 178 | 167 | 1.14% | 5 | 34.99 | Township |
| Monroe township | 21 | 178 | 167 | 1.14% | 6 | 28.22 | Township |
| Norway township | 22 | 165 | 157 | 0.61% | 5 | 35.77 | Township |
| Monroe | 23 | 162 | 156 | 0.62% | 427 | 0.38 | Town |
| Dolton township | 24 | 120 | 113 | 0.84% | 4 | 29.09 | Township |
| Davis | 25 | 56 | 55 | 0% | 130 | 0.43 | Town |
| Centerville township | 26 | 39 | 37 | 2.63% | 1 | 34.95 | Township |
Parker is the largest city in Turner County, with a population of 1,319.
Centerville township is the smallest city in Turner County.
There are 26 cities in Turner County, South Dakota.