Washington - Role: Building
| Thorp Mill |
| Thorton, William Harper, House |
| Three Forks Shelter |
| Three Lakes Patrol Cabin |
| Thronson, J. A., House |
| Thurston County Courthouse |
| Ticknor School |
| Times Building |
| Tipsoo Lake Comfort Station |
| Tokeland Hotel |
| Tolmie Peak Fire Lookout |
| Tracy House |
| Trafton School |
| Triangle Hotel and Bar |
| Trinity Parish Church |
| Trommald Building |
| Trout Lake Tourist Club |
| Trumbull, John, House |
| Tucker, Horace, House |
| Tuell, Frank and Maude, House |
| Tukwila School |
| Tulalip Indian Agency Office |
| Tumwater Methodist Church |
| Turner-Koepf House |
| Turner, Luther P. and Jane Marie, House |
| Tyee Mountain Lookout |
| Tyni Building |
| Uncas School |
| Underwood, Edward and Isabelle, Farm-Five Oaks Farm |
| Union Mills Superintendent's House |
| Union Pacific Freight Building |
| Union Passenger Station |
| Union Stables |
| Union Station |
| United Presbyterian Church |
| United Shopping Tower |
| United States Border Station |
| University Heights School |
| University National Bank Building |
| University of Washington Faculty Club |
| U.S. Courthouse |
| U.S. Immigrant Station and Assay Office |
| US Immigration Building |
| U.S. Inspection Station-Ferry, Washington |
| U.S. Inspection Station-Laurier, Washington |
| U.S. Marine Hospital |
| U.S. National Bank Building |
| U.S. Post Office |
| U.S. Post Office |
| U.S. Post Office and Annex |
| U. S. Post Office and Courthouse |
| U.S. Post Office and Courthouse |
| U.S. Post Office and Customshouse |
| US Post Office-Bremerton Main |
| US Post Office-Camas Main |
| US Post Office-Centralia Main |
| US Post Office-Chehalis Main |
| US Post Office-Clarkston Main |
| US Post Office-Colfax Main |
| US Post Office-Colville Main |
| US Post Office, Courthouse, and Custom House |
| US Post Office-Hoquiam Main |
| US Post Office-Kelso Main |
| US Post Office-Longview Main |
| US Post Office-Lyden Main |
| US Post Office-Montesano Main |
| US Post Office-Okanogan Main |
| US Post Office-Omak Main |
| US Post Office-Port Townsend Main |
| US Post Office-Prosser Main |
| U.S. Post Office-Pullman |
| US Post Office-Raymond Main |
| US Post Office-Sedro Woolley Main |
| US Post Office-Sunnyside Main |
| US Post Office-Tacoma Downtown Station-Federal Building |
| US Post Office-Toppenish Main |
| US Post Office-Vancouver Main |
| US Post Office-Walla Walla Main |
| US Quarantine Station Surgeon's Residence |
| Utsalady Ladies Aid Building |
| Van Arsdol, C. C., House |
| Vancouver Public Library |
| Vancouver Telephone Building |
| Van Trojen House |
| Vashon Hardware Store |
| Venersborg School |
| Verlot Ranger Station-Public Service Center |
| Victorian Apartments |
| Vincent School |
| Volker, William, Building |
| Waitsburg High School |
| Walker Apartment Hotel |
| Walla Walla Public Library |
| Walla Walla Valley Traction Company Car Barn |
| Wallingford Fire and Police Station |
| Ward House |
| Ward, Milo P., House |
| Wardner, James F., House |
| Waring, Guy, Cabin |
| Warner, William and Ella, House |
Data from United States Park Service and Wikidata
