Washington - Area of significance: Commerce
| Interior Grain Tramway |
| Kemp & Hebert Building |
| Kiggins, John P. and Mary, House |
| Kiggins Theater |
| La Conner Historic District |
| LA MERCED |
| Larrabee House |
| Leader Building |
| Leamington Hotel and Apartments |
| Leopold Hotel |
| Lincoln Hotel |
| Longview Civic Center Historic District |
| Longview Community Store |
| Lord, C. J., Mansion |
| Lord, Richard Hinton, House |
| Ludwigs, George, House |
| Luepke Florist |
| Lumber Exchange Building |
| Lynden Department Store |
| Lynn, C.O., Co. Funeral Home |
| Maloney's General Store |
| Manley-Thompson Ford Agency |
| McAlmond House |
| McCabe Building |
| McGrath Cafe and Hotel-The McGrath |
| Miller, Alexander, House |
| Miller, John J., House |
| Millwood Historic District |
| Montague and McHugh Building |
| Monte Cristo Hotel |
| Morse Hardware Company Building |
| Morse, Robert I., House |
| Mottman Building |
| Mukai Cold Process Fruit Barrelling Plant |
| Natatorium Carousel |
| National Bank of Tacoma |
| National Building |
| Neighbor-Bennett House |
| Newell, Charles, House |
| New Washington Hotel |
| North Bonneville Archeological District |
| Northern Pacific Office Building |
| Northwestern Improvement Company Store |
| Oakesdale City Hall |
| Oatman, Earl, House |
| Old City Hall Historic District |
| Old North Yakima Historic District |
| Olympia Downtown Historic District |
| Olympia National Bank |
| Olympic Club |
| Olympic Club Saloon |
| Orcas Hotel |
| Oysterville Historic District |
| Pacific Telephone and Telegraph Building |
| Palmer, A.L., Building |
| Palouse Main Street Historic District |
| Pantages Theatre |
| Pennsylvania Avenue-West Side Historic District |
| Perkins Building |
| Peyton Building and Peyton Annex |
| Pike Place Public Market Historic District |
| Pioneer Square-Skid Road District |
| Point Wilson Lighthouse |
| Port Townsend Historic District |
| Pounder Building |
| President Hotel |
| RELIEF (lightship) |
| Rhodes, Henry A. and Birdella, House |
| Rhodesleigh |
| Rickey Block |
| Ridpath Hotel |
| Ritzville Historic District |
| Riverside Avenue Historic District |
| Roanoke Park Historic District |
| Roeder, Victor A., House |
| Rosedell |
| Roth, Lottie, Block |
| Rothschild House |
| Rucker House |
| Sanitary Meat Market |
| Sara Store |
| Saunders, James C., House |
| Schade Brewery |
| Schumann Building |
| Seattle Chinatown Historic District |
| Seehorn-Lang Building |
| Sevier and Weed Building |
| Shelburne Hotel |
| Shuey, Henry Owen, House |
| SIERRA (motor ship) |
| Singer's Lake Crescent Tavern |
| Skansie, Andrew & Bertha, Net Shed and House |
| Skykomish Historic Commercial District |
| Small-Elliott House |
| Smith, Nat, House |
| Snohomish Historic District |
| South Capitol Neighborhood Historic District |
| Spokane Flour Mill |
| Spokane & Inland Empire Railroad Car Facility |
| Sprague Building |
Data from United States Park Service and Wikidata
