List of botanical gardens and arboretums in Washington (state)
This list of botanical gardens and arboretums in Washington is intended to include all significant botanical gardens and arboretums in the U.S. state of Washington.
| Name | Image | Affiliation | City | Coordinates |
| Bellevue Botanical Garden | Bellevue | |||
| Bloedel Reserve | Bainbridge Island | |||
| Bonhoeffer Botanical Gardens | Stanwood | |||
| Evergreen Arboretum and Gardens | Everett | |||
| Carl S. English Jr. Botanical Gardens | Seattle | |||
| John A. Finch Arboretum | Spokane | |||
| Heronswood | Kingston | |||
| Highline Botanical Garden | SeaTac | |||
| Hulda Klager Lilac Gardens | Woodland | |||
| Kruckeberg Botanic Garden | Shoreline | |||
| Lake Wilderness Arboretum | Maple Valley | |||
| Lakewold Gardens | Lakewood | |||
| Manito Park and Botanical Gardens | Spokane | |||
| Meerkerk Rhododendron Gardens | Greenbank | |||
| Rhododendron Species Foundation and Botanical Garden | Federal Way | |||
| Seattle Chinese Garden | Seattle | |||
| Sehome Hill Arboretum | Bellingham | |||
| South Seattle College Arboretum | South Seattle College | Seattle | ||
| Washington Park Arboretum | University of Washington | Seattle | ||
| Washington State Capitol Conservatory | Washington State Capitol campus | Olympia | ||
| Wind River Arboretum | Gifford Pinchot National Forest | Carson | ||
| Point Defiance Park | Point Defiance Zoo & Aquarium | Tacoma | ||
| Wright Park Arboretum | Tacoma | |||
| Yakima Area Arboretum | Yakima |