From List of National Natural Landmarks, these are the National Natural Landmarks in Washington. There are 17 in total, X are lakes or pond, Y are forests, Z are other.
| Name | Image | Date | Location | County | Description | |
|---|---|---|---|---|---|---|
| 1 | Boulder Park and McNeil Canyon Haystack Rocks | Washington | ||||
| 2 | Davis Canyon | Washington | ||||
| 3 | Drumheller Channels | 1986 | Adams | Illustrates the dramatic modification of the Columbia Plateau volcanic terrain by late Pleistocene catastrophic glacial outburst floods. | ||
| 4 | Ginkgo Petrified Forest | Washington | ||||
| 5 | Grand Coulee | Washington | ||||
| 6 | Grande Ronde Feeder Dikes | Washington | ||||
| 7 | Grande Ronde Goosenecks | Washington | ||||
| 8 | The Great Gravel Bar of Moses Coulee | Washington | ||||
| 9 | Mima Mounds | Washington | ||||
| 10 | Nisqually Delta | Washington | ||||
| 11 | Point of Arches | Washington | ||||
| 12 | Rose Creek Preserve | Washington | ||||
| 13 | Sims Corner Eskers and Kames | Washington | ||||
| 14 | Steptoe and Kamiak Buttes | Washington | ||||
| 15 | Umtanum Ridge Water Gap | Washington | ||||
| 16 | Wallula Gap | Washington | ||||
| 17 | Withrow Moraine and Jameson Lake Drumlin Field | Washington |
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