Founded in 1909, Bennett County is one of 66 counties in the state of South Dakota. Historically, Bennett County was formed from Lugenbeel, Oglala Lakota, Washabaugh, and Washington Counties. The city of Martin is the county seat. With FIPS code of 7, Bennett County has a population of 3,406 and area of 1,185 square miles (3,069 km2).
List of all cities in Bennett County, SD alphabetically
| City/Town | Postal Code | Area Code |
| Allen, SD | 57714 | 605 |
| Harrington, SD | 57551 | 605 |
| Martin, SD | 57551 | 605 |
| Patricia, SD | 57551 | 605 |
| Swett, SD | 57551 | 605 |
| Tuthill, SD | 57574 | 605 |
| Vetal, SD | 57551 | 605 |