Towns
| State | City/Town | Town Title |
|---|---|---|
| South Dakota | Lane | Lane, SD |
| South Dakota | Langford | Langford, SD |
| South Dakota | Lantry | Lantry, SD |
| South Dakota | Lead | Lead, SD |
| South Dakota | Lebanon | Lebanon, SD |
| South Dakota | Lemmon | Lemmon, SD |
| South Dakota | Lennox | Lennox, SD |
| South Dakota | Leola | Leola, SD |
| South Dakota | Lesterville | Lesterville, SD |
| South Dakota | Letcher | Letcher, SD |
| South Dakota | Little Eagle | Little Eagle, SD |
| South Dakota | Lodgepole | Lodgepole, SD |
| South Dakota | Long Valley | Long Valley, SD |
| South Dakota | Longlake | Longlake, SD |
| South Dakota | Lower Brule | Lower Brule, SD |
| South Dakota | Ludlow | Ludlow, SD |
| South Dakota | Lyons | Lyons, SD |
| South Dakota | Madison | Madison, SD |
| South Dakota | Manderson | Manderson, SD |
| South Dakota | Mansfield | Mansfield, SD |
| South Dakota | Marion | Marion, SD |
| South Dakota | Martin | Martin, SD |
| South Dakota | Marty | Marty, SD |
| South Dakota | Marvin | Marvin, SD |
| South Dakota | Mc Intosh | Mc Intosh, SD |