There are 14 National Natural Landmarks in Maine.
| Name | Image | Date | Location | County | Ownership | Description |
|---|---|---|---|---|---|---|
| private | A large peatland with continuous forest cover and well-developed hummock-and- hollow topography. | |||||
| state | A tombolo that has been eroded by the sea. | |||||
| private | Northern sphagnum bog located in a deep kettle hole, the sphagnum mat exceeds a depth of 40feet. | |||||
| 46.0345°N -68.3304°W | private | An undisturbed, sphagnum bog considered one of the largest and finest in Maine. | ||||
| 45.4841°N -69.323°W | federal (Appalachian Trail) | Waterfalls, cliffs, and growth of spruce-fir forest on the gorge walls give the site unusual scenic beauty. | ||||
| federal (Appalachian Trail) | One of the few undisturbed, old-growth white pine stands remaining in New England. | |||||
| 43.7622°N -69.3203°W | private | Dense, almost pure stands of red spruce and over 400 species of wildflower. | ||||
| 45.1473°N -70.2892°W | Franklin, Somerset | state | Exceptionally scenic and wild, with some of the best summit views in the eastern United States. | |||
| 45.9044°N -68.9213°W | state (Baxter State Park) | Kames, eskers, drumlins, kettleholes, moraines, and erratics provide a complete illustration of glacial geology. | ||||
| 43.9792°N -70.3355°W, | private | A small, remnant, forested swamp dominated mostly by virgin black gum. | ||||
| 45.5324°N -70.281°W | state, private | The only large, intermontane peatland and one of the few expansive, virgin landscapes in the northeastern United States. | ||||
| 44.8691°N -68.7257°W | municipal, private | A classic northern sphagnum bog. | ||||
| 45.1941°N -68.5616°W | private | One of the largest, unspoiled wetlands in the state of Maine. | ||||
| 44.4076°N -69.8278°W | private | Kettle hole bogs and ponds. | ||||