60 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Aberdeen | 1 | 27,895 | 28,432 | -0.38% | 1,689 | 16.52 | City |
| Groton | 2 | 1,334 | 1,386 | -0.74% | 762 | 1.75 | City |
| Lincoln township | 3 | 1,132 | 1,164 | -0.96% | 24 | 48.16 | Township |
| Mina | 4 | 1,021 | 718 | 7.14% | 270 | 3.78 | CDP |
| Aberdeen township | 5 | 858 | 897 | -1.27% | 23 | 37.97 | Township |
| Bath township | 6 | 676 | 699 | -1.02% | 16 | 41.76 | Township |
| Prairiewood Village | 7 | 514 | 438 | 7.08% | 871 | 0.59 | CDP |
| Warner township | 8 | 503 | 522 | -1.18% | 6 | 79.94 | Township |
| Warner | 9 | 450 | 482 | -1.32% | 1,613 | 0.28 | Town |
| Ravinia township | 10 | 360 | 376 | -1.37% | 10 | 35.06 | Township |
| Prairiewood township | 11 | 291 | 302 | -1.02% | 493 | 0.59 | Township |
| Ordway township | 12 | 270 | 278 | -0.74% | 7 | 41.36 | Township |
| Frederick | 13 | 201 | 213 | -0.99% | 148 | 1.35 | Town |
| Gem township | 14 | 191 | 197 | -1.04% | 3 | 66.24 | Township |
| Hecla | 15 | 185 | 195 | -1.07% | 538 | 0.34 | City |
| Mercier township | 16 | 163 | 166 | -0.61% | 5 | 36 | Township |
| Columbia | 17 | 155 | 157 | 0% | 102 | 1.52 | City |
| Garden Prairie township | 18 | 135 | 142 | -2.17% | 4 | 36.02 | Township |
| Groton township | 19 | 126 | 131 | -1.56% | 3 | 46.26 | Township |
| Claremont township | 20 | 119 | 124 | -1.65% | 2 | 53.98 | Township |
| Cambria township | 21 | 116 | 122 | -1.69% | 3 | 36.26 | Township |
| East Hanson township | 22 | 108 | 114 | -1.82% | 3 | 35.90 | Township |
| Claremont | 23 | 104 | 108 | -0.95% | 414 | 0.25 | Town |
| New Hope township | 24 | 102 | 101 | 0.99% | 3 | 36.05 | Township |
| Columbia township | 25 | 99 | 105 | -1.98% | 2 | 47.74 | Township |
| Oneota township | 26 | 99 | 105 | -1.98% | 3 | 35.95 | Township |
| Brainard township | 27 | 98 | 104 | -2% | 2 | 52.53 | Township |
| Putney township | 28 | 92 | 91 | 1.1% | 3 | 36.24 | Township |
| Westport township | 29 | 88 | 87 | 1.15% | 3 | 28.88 | Township |
| Bath Corner | 30 | 86 | 17 | 7.5% | 491 | 0.17 | CDP |
| Westport | 31 | 84 | 89 | -1.18% | 357 | 0.23 | Town |
| East Rondell township | 32 | 82 | 83 | 0% | 2 | 35.90 | Township |
| Shelby township | 33 | 81 | 84 | -1.22% | 2 | 48.84 | Township |
| Highland township | 34 | 76 | 77 | 0% | 2 | 36.11 | Township |
| Garland township | 35 | 67 | 69 | -1.47% | 2 | 29.64 | Township |
| West Rondell township | 36 | 65 | 67 | -1.52% | 2 | 34.09 | Township |
| Richland township | 37 | 60 | 64 | -1.64% | 2 | 35.93 | Township |
| Riverside township | 38 | 60 | 64 | -1.64% | 2 | 36 | Township |
| Palmyra township | 39 | 58 | 61 | -1.69% | 2 | 34.17 | Township |
| Stratford | 40 | 57 | 59 | 0% | 228 | 0.25 | Town |
| Mansfield | 41 | 54 | 91 | 8% | 22 | 2.41 | CDP |
| Savo township | 42 | 50 | 52 | -1.96% | 1 | 35.57 | Township |
| South Detroit township | 43 | 48 | 52 | -2.04% | 1 | 36.21 | Township |
| Frederick township | 44 | 46 | 48 | -2.13% | 1 | 34.81 | Township |
| North Detroit township | 45 | 44 | 48 | -2.22% | 1 | 35.64 | Township |
| West Hanson township | 46 | 44 | 48 | -2.22% | 1 | 35.95 | Township |
| Liberty township | 47 | 40 | 44 | -2.44% | 1 | 46.83 | Township |
| Greenfield township | 48 | 37 | 35 | 2.78% | 1 | 32.59 | Township |
| Osceola township | 49 | 37 | 38 | 0% | 1 | 35.69 | Township |
| Portage township | 50 | 36 | 37 | 0% | 1 | 35.65 | Township |
| Carlisle township | 51 | 31 | 32 | 0% | 1 | 36 | Township |
| Hecla township | 52 | 31 | 32 | 0% | 1 | 23.95 | Township |
| Lansing township | 53 | 30 | 31 | 0% | 1 | 34.33 | Township |
| Franklyn township | 54 | 28 | 31 | -3.45% | 1 | 35.81 | Township |
| Bath | 55 | 27 | 217 | -27.03% | 93 | 0.29 | CDP |
| Ferney | 56 | 27 | 37 | 3.85% | 27 | 1 | CDP |
| Allison township | 57 | 23 | 26 | -4.17% | 1 | 35.89 | Township |
| Bates township | 58 | 23 | 26 | -4.17% | 1 | 35.74 | Township |
| Wetonka | 59 | 12 | 14 | 0% | 49 | 0.25 | Town |
| Verdon | 60 | 7 | 7 | 0% | 28 | 0.25 | Town |
Aberdeen is the largest city in Brown County, with a population of 27,895.
Verdon is the smallest city in Brown County.
There are 60 cities in Brown County, South Dakota.