Places beginning with SU in South Dakota, United States
- Success (historical)
- Sully County
- Sully, Township of
- Sulpher (historical), Township of
- Sulphur
- Summerville
- Summit
- Summit, Town of
- Summit, Township of
- Summit, Township of
- Summit, Township of
- Sumner (historical), Township of
- Sumner, Township of
- Sundahl Trailer Court
- Sunnyside, Township of
- Sunnyview
- Sun Prairie, Township of
- Surprise Valley, Township of
- Surrey, Township of
- Susquehanna, Township of