Washington - Significance region: National
| Pioneer Building, Pergola, and Totem Pole |
| Pittock House |
| Point No Point Light Station |
| Port Gamble Historic District |
| Port Townsend Historic District |
| Puget Sound Radio Station Historic District |
| Randle Ranger Station-Work Center |
| Rattlesnake Springs Sites |
| Raymond-Ogden Mansion |
| Red Shield Inn |
| RELIEF (lightship) |
| Riblet, Royal, House |
| Roche Harbor |
| Rock Island Railroad Bridge |
| Ryegrass Archeological District |
| San Juan Island, Lime Kiln Light Station |
| San Juan Island National Historic Site |
| Savage Island Archeological District |
| Seattle Electric Company Georgetown Steam Plant |
| Sequalitchew Archeological Site |
| SIERRA (motor ship) |
| Skinner Building |
| Small-Elliott House |
| Snake River Archeological District |
| Snively Canyon Archeological District |
| Snoqualmie Falls Hydroelectric Power Plant Historic District |
| Southern Columbia Plateau and Okanogan Highlands Site No. 45DO1243 |
| Southern Columbia Plateau and Okanogan Highlands Site No. 45DO1244 |
| Southern Columbia Plateau and Okanogan Highlands Site No. 45DO1245 |
| Stadium-Seminary Historic District |
| Steptoe Battlefield Site |
| Stevens Pass Historic District |
| St. Paul's Mission |
| Sunrise Historic District |
| Tacoma Narrows Bridge Ruins |
| Tatoosh Island |
| Tekison Cave |
| The Sentinel |
| Thompson, Albert W., Hall |
| Thornewood |
| Tumwater Historic District |
| Union Depot-Warehouse Historic District |
| Union Passenger Station |
| Untitled Earthwork-Johnson Pit #30 |
| USCG-11 (united states coast guard patrol vessel) |
| USCGC FIR |
| U.S. Immigrant Station and Assay Office |
| U.S. Marine Hospital |
| USS HORNET |
| U.S.S. MISSOURI |
| Van Arsdol, C. C., House |
| Vancouver National Historic Reserve Historic District |
| Verlot Ranger Station-Public Service Center |
| VIRGINIA V |
| Volunteer Park |
| Walker Cut Stone Company |
| Washington State Capitol Historic District |
| Wedding Rock Petroglyphs |
| Wenatchee Flat Site |
| Whitman Mission National Historic Site |
| Wishram Indian Village Site |
| Wolfenbarger Site |
| Wooded Island Archeological District |
| W. T. PRESTON (snagboat) |
| Yakima Park Stockade Group |
| Yellowstone Road, The |
| ZODIAC (schooner) |
Data from United States Park Service and Wikidata
