From List of National Natural Landmarks, these are the National Natural Landmarks in Iowa. There are 8 in total, X are lakes or pond, Y are forests, Z are other.
| Name | Image | Date | Location | County | Description | |
|---|---|---|---|---|---|---|
| 1 | Anderson Goose Lake | 1975 | Iowa | One of the few essentially natural glacial pothole lakes remaining in Iowa. | ||
| 2 | Cayler Prairie | 1965 | Dickinson | An example of the increasingly rare virgin prairie grassland. | ||
| 3 | Cold Water Cave | 1987 | Winneshiek | An exceptional example of an extensive cave system well decorated with speleothems. | ||
| 4 | Dewey's Pasture and Smith's Slough | 1975 | Clay, Palo Alto | Pothole lakes created during the last glacial epoch. | ||
| 5 | Hayden Prairie State Preserve | 1965 | Howard | A true prairie remnant. | ||
| 6 | Loess Hills | 1986 | Harrison, Monona | The best examples of loess topography in the Missouri River Bluffs region. | ||
| 7 | White Pine Hollow State Forest | 1967 | Dubuque | The only known remaining white pine tract in Iowa. |
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