There are 9 cities in Lyman 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 | 2024 Population | 2020 Population | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Fort Pierre | 1 | 2,194 | 2,116 | 0.87% | 703 | 3.1 | City |
| Gregory | 2 | 1,219 | 1,230 | -0.24% | 708 | 1.7 | City |
| Lower Brule | 3 | 938 | 971 | 2.51% | 2,584 | 0.4 | CDP |
| West Brule | 4 | 620 | 383 | 7.83% | 525 | 1.2 | CDP |
| Presho | 5 | 462 | 469 | -0.43% | 689 | 0.7 | City |
| Oacoma | 6 | 391 | 386 | 0.26% | 150 | 2.6 | Town |
| Kennebec | 7 | 286 | 278 | 0.7% | 335 | 0.9 | Town |
| Reliance | 8 | 126 | 128 | -0.79% | 116 | 1.1 | Town |
| Vivian | 9 | 38 | 87 | -13.64% | 22 | 1.7 | CDP |
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.
Fort Pierre is the largest city in Lyman County.
Vivian is the smallest city in Lyman County.
There are 9 cities in Lyman County, South Dakota.