Founded in 1873, Hanson County is one of 66 counties in the state of South Dakota. Historically, Hanson County was formed from Buffalo and Deuel Counties. The city of Alexandria is the county seat. With FIPS code of 61, Hanson County has a population of 3,505 and area of 435 square miles (1,127 km2).
List of all cities in Hanson County, SD alphabetically
| City/Town | Postal Code | Area Code |
| Alexandria, SD | 57311 | 605 |
| Clayton, SD | 57332 | 605 |
| Emery, SD | 57332 | 605 |
| Farmer, SD | 57311 | 605 |
| Fulton, SD | 57340 | 605 |
| Plano, SD | 57340 | 605 |