| Official Name: | Cactus Flat, South Dakota |
| Pushpin Map: | South Dakota#USA |
| Pushpin Label: | Cactus Flat |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | South Dakota |
| Subdivision Type2: | County |
| Subdivision Name2: | Jackson |
| Timezone: | Mountain (MST) |
| Utc Offset: | -7 |
| Timezone Dst: | MDT |
| Utc Offset Dst: | -6 |
| Elevation Ft: | 2500 |
| Coordinates: | 43.8356°N -101.8944°W |
| Area Code: | 605 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 1261390 |
Cactus Flat (also Cactus Flat Junction, Cactus Flats) is an unincorporated community in Jackson County, South Dakota, United States. The community is home to several nearby campgrounds and prairie dog towns which are marketed as tourist attractions.[1]
The Ranch Store building was originally located in Kadoka, South Dakota, but was later moved to Cactus Flat.[2]