From List of National Natural Landmarks, these are the National Natural Landmarks in South Dakota.
| Name | Image | Date | Location | County | Ownership | Description | |
|---|---|---|---|---|---|---|---|
| 1 | mixed- state, private | A channel cut by the Ancient River Warren during the Ice Age. | |||||
| 2 | 44.4758°N -103.4269°W | mixed- state, tribal, private | A cone-shaped mass of igneous rock standing alone 1300feet above the surrounding plains. | ||||
| 3 | 43.5178°N -99.1472°W | private | An excellent example of an erosional remnant of soft clays and shales capped by a channel sandstone and quartzite. | ||||
| 4 | 43.8743°N -96.939°W | state | Excellent examples of a prairie pothole with native emergent vegetation, and a native bluestem prairie. | ||||
| 5 | 45.5276°N -103.171°W | federal (Custer National Forest) | Steep-walled, flat-topped buttes standing 200feetto400feetft (toft) above the surrounding prairie. | ||||
| 6 | 43.8411°N -103.5444°W | state (Custer State Park) | An excellent, rare example of joint-controlled weathering of granite. | ||||
| 7 | 44.9571°N -97.1935°W | mixed- state, private | A completely undisturbed wetland complex including potholes, streams, shallow open water, lakes, and marsh. | ||||
| 8 | federal (Missouri National Recreational River) | A prime winter roosting area for bald and golden eagles. | |||||
| 9 | 44.285°N -97.4619°W | state | Contains a large undisturbed and unmanipulated marsh, an outstanding waterfowl breeding and resting area. | ||||
| 10 | 43.4247°N -103.4831°W | private | One of the largest concentrations of mammoth remains in the United States. | ||||
| 11 | 43.7264°N -99.2252°W | state | One of the largest remaining natural and unmanipulated prairie pothole lakes. | ||||
| 12 | 45.7419°N -97.2425°W | Marshall | state | Displays many facets of natural history. | |||
| 13 | tribal (Oglala Sioux) | Illustrates one of two types of sand calcite deposits in the world. | |||||