List of National Natural Landmarks in Iowa
From List of National Natural Landmarks, these are the National Natural Landmarks in Iowa. There are 8 in total.
| Name | Image | Date | Location | County | Ownership | Description | |
| 1 | Anderson Goose Lake | Iowa | Private | One of the few essentially natural glacial pothole lakes remaining in Iowa. | |||
| 2 | Cayler Prairie | Dickinson | State | An example of the increasingly rare virgin prairie grassland. | |||
| 3 | Cold Water Cave | Winneshiek | Private | An exceptional example of an extensive cave system well decorated with speleothems. | |||
| 4 | Dewey's Pasture and Smith's Slough | Clay, Palo Alto | State | Pothole lakes created during the last glacial epoch. | |||
| 5 | Hayden Prairie State Preserve | Howard | State | A true prairie remnant. | |||
| 6 | Loess Hills | Harrison, Monona | State, private | The best examples of loess topography in the Missouri River Bluffs region. | |||
| 7 | White Pine Hollow State Forest | Dubuque | State | The only known remaining white pine tract in Iowa. |