There are 19 cities in Hamlin County, South Dakota.
Note: As defined by the US Census Bureau, a city's official boundaries often extend miles beyond the city itself and may even cross county lines. As such, several thousand US cities officially exist in two or more counties (and therefore appear on multiple counties' lists of cities.)
City | Rank | State | 2024 Population | 2020 Census | Annual Change | Density (mi²) | Area (mi²) |
|---|---|---|---|---|---|---|---|
| Watertown | 1 | South Dakota | 23,363 | 22,675 | 0.74% | 1,267 | 18.44 |
| Clear Lake | 2 | South Dakota | 1,229 | 1,219 | 0.24% | 406 | 3.03 |
| Arlington | 3 | South Dakota | 951 | 921 | 0.85% | 554 | 1.72 |
| Estelline | 4 | South Dakota | 747 | 745 | 0.13% | 790 | 0.94 |
| Castlewood | 5 | South Dakota | 718 | 696 | 0.84% | 624 | 1.15 |
| Lake Norden | 6 | South Dakota | 627 | 559 | 2.79% | 719 | 0.87 |
| Bryant | 7 | South Dakota | 478 | 468 | 0.63% | 912 | 0.52 |
| Hayti | 8 | South Dakota | 407 | 391 | 0.99% | 921 | 0.44 |
| Lake Poinsett | 9 | South Dakota | 396 | 480 | -5.04% | 81 | 4.89 |
| Henry | 10 | South Dakota | 267 | 255 | 1.14% | 184 | 1.45 |
| Kranzburg | 11 | South Dakota | 169 | 163 | 1.2% | 221 | 0.76 |
| Goodwin | 12 | South Dakota | 152 | 146 | 1.33% | 321 | 0.47 |
| Hazel | 13 | South Dakota | 101 | 103 | 0% | 417 | 0.24 |
| Spring Lake Colony | 14 | South Dakota | 82 | 0 | 34.43% | 288 | 0.28 |
| Vienna | 15 | South Dakota | 54 | 52 | 1.89% | 64 | 0.84 |
| Naples | 16 | South Dakota | 40 | 40 | 0% | 288 | 0.14 |
| Altamont | 17 | South Dakota | 30 | 30 | 0% | 24 | 1.25 |
| Hetland | 18 | South Dakota | 18 | 18 | 0% | 158 | 0.11 |
| Waverly | 19 | South Dakota | 0 | 51 | 0% | 0 | 1.02 |
Note: City markers shown outside the county boundary mean that a part of the city extends into this county, but is primarily located in an adjacent county.
Watertown is the largest city in Hamlin County.
Waverly is the smallest city in Hamlin County.
There are 19 cities in Hamlin County, South Dakota.