7 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Spearfish | 1 | 14,592 | 12,225 | 2.78% | 845 | 17 | City |
| Lead | 2 | 3,067 | 2,979 | 0.49% | 1,490 | 2 | City |
| Deadwood | 3 | 1,444 | 1,152 | 3.51% | 293 | 5 | City |
| Whitewood | 4 | 999 | 897 | 1.73% | 1,568 | 1 | City |
| St. Onge | 5 | 377 | 327 | 1.62% | 11 | 36 | Township |
| Central City | 6 | 112 | 99 | 1.82% | 757 | 0 | City |
| Whitewood | 7 | 94 | 91 | 0% | 2 | 49 | Township |
Spearfish is the largest city in Lawrence County, with a population of 14,592.
Whitewood is the smallest city in Lawrence County, with a population of 94.
There are 7 cities in Lawrence County, South Dakota.