This is a list of National Natural Landmarks (NNL) in American Samoa. All locations are on communally owned lands.
| Name | Designated | District | Coordinates | Description | Image | |
|---|---|---|---|---|---|---|
| Cape Taputapu | 1972 | Western | 14°19′17″S170°50′36″W / 14.3214°S 170.8432°W | A natural exhibit of shoreline, offshore volcanic rocks, and blowholes sculpted by heavy sea-wave action |  | |
| Fogamaʻa Crater | 1972 | Western | 14°21′24″S170°45′13″W / 14.3568°S 170.7535°W | One of very few illustrations of the most recent episode of volcanism in American Samoa |  | |
| Matafao Peak | 1972 | Eastern | 14°17′38″S170°42′16″W / 14.2939°S 170.7045°W | One of five great masses of volcanic rocks that extruded as molten magma during the major episodes of volcanism that created Tutuila Island |  | |
| Leʻala Shoreline | 1972 | Western | 14°21′36″S170°46′38″W / 14.3600°S 170.7773°W | A young flow of basalt, inter-bedded with layers of tuff, that illustrates erosion by wave action |  | |
| Rainmaker Mountain (Mount Pioa) | 1972 | Eastern | 14°16′21″S170°39′21″W / 14.2725°S 170.6558°W | An outstanding example of the gigantic plugs that created Tutuila Island |  | |
| Vai'ava Strait | 1972 | Eastern | 14°14′21″S170°40′17″W / 14.2393°S 170.6715°W | A classic illustration of steep cliffs and erosion-resistant outliers formed by wave action on a volcanic mass |  | |
| Aunu'u Island | 1972 | Eastern | 14°17′00″S170°33′12″W / 14.2833°S 170.5534°W | The site of recent episodes of volcanism backed by a geologically recent tuff cone |  | |