Washington - Area of significance: Landscape Architecture
| Browne's Addition Historic District |
| Cama Beach Resort |
| Causland Park |
| Chittenden Locks and Lake Washington Ship Canal |
| Colman Park & Dose Terrace Stairs |
| Corbin Park Historic District |
| Dunn Gardens |
| Eddy, James G., House and Grounds |
| Eldridge Avenue Historic District |
| Freeway Park |
| Frink Park |
| Gas Works Park |
| Hollywood Farm |
| Lake Sacajawea Park |
| Lake Washington Boulevard |
| Lakewold |
| Lewisville Park |
| Long, Robert Alexander, High School |
| Longview Civic Center Historic District |
| Manito Park and Boulevard |
| Marycliff-Cliff Park Historic District |
| Merrill, R. D., House |
| Mission Avenue Historic District |
| Mount Baker Park and Boulevard |
| Mount Baker Park Historic District |
| Mount Rainier National Park |
| Mukai Cold Process Fruit Barrelling Plant |
| Northern State Hospital |
| Old Main, Western Washington State College |
| Olympia Downtown Historic District |
| Pioneer Square-Skid Road District |
| Redelsheimer-Ostrander House |
| Riblet, Royal, House |
| Riverside Avenue Historic District |
| Rockwood Historic District |
| Roeder, Victor A., House |
| Rosario |
| Rucker House |
| Skagit River and Newhalem Creek Hydroelectric Projects |
| Storey, Ellsworth, Cottages Historic District |
| Town Square |
| Untitled Earthwork-Johnson Pit #30 |
| Volunteer Park |
| Wright Park and Seymour Conservatory |
Data from United States Park Service and Wikidata
