List of National Natural Landmarks in Oklahoma
There are 3 National Natural Landmarks in Oklahoma.
| Name | Image | Date | Location | County | Ownership | Description |
| Devil's Canyon | Canadian | private | Known for several different mesic plants in a diverse environment of oak woodland/tall prairie grass and eastern deciduous forest | |||
| McCurtain County Wilderness Area | Broken Bow | McCurtain | state | A wilderness nature preserve since 1918. It is an excellent example of a xeric upland oak-pine forest | ||
| Salt Plains National Wildlife Refuge | Jet | Alfalfa | federal | A National Wildlife Refuge, it is a critical habitat for 75% of the endangered whooping crane population. |