| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Martin | 1 | 926 | 946 | -0.43% | 1,654 | 1 | City |
Martin is the largest city in Bennett County, with a population of 926.
Martin is the smallest city in Bennett County, with a population of 926.
There is 1 city in Bennett County, South Dakota.