Towns
| State | City/Town | Town Title |
|---|---|---|
| South Dakota | Hudson | Hudson, SD |
| South Dakota | Humboldt | Humboldt, SD |
| South Dakota | Hurley | Hurley, SD |
| South Dakota | Huron | Huron, SD |
| South Dakota | Ideal | Ideal, SD |
| South Dakota | Interior | Interior, SD |
| South Dakota | Ipswich | Ipswich, SD |
| South Dakota | Irene | Irene, SD |
| South Dakota | Iroquois | Iroquois, SD |
| South Dakota | Isabel | Isabel, SD |
| South Dakota | Java | Java, SD |
| South Dakota | Jefferson | Jefferson, SD |
| South Dakota | Kadoka | Kadoka, SD |
| South Dakota | Kaylor | Kaylor, SD |
| South Dakota | Keldron | Keldron, SD |
| South Dakota | Kennebec | Kennebec, SD |
| South Dakota | Keystone | Keystone, SD |
| South Dakota | Kimball | Kimball, SD |
| South Dakota | Kranzburg | Kranzburg, SD |
| South Dakota | Kyle | Kyle, SD |
| South Dakota | Labolt | Labolt, SD |
| South Dakota | Lake Andes | Lake Andes, SD |
| South Dakota | Lake City | Lake City, SD |
| South Dakota | Lake Norden | Lake Norden, SD |
| South Dakota | Lake Preston | Lake Preston, SD |