Oregon - Significance region: Local
| Swetland Building |
| Swigert, Ernest G., House |
| Talent Elementary School |
| Tanner, Albert H., House |
| Tannler-Armstrong House |
| Tarpley, Louis and Bessie, House |
| Taverner, George, House |
| Tayler-Phipps Building |
| Taylor, Dr. W.R. and Eunice, House |
| Taylor, George, House |
| Taylor, Jack, House |
| Taylor, Peter, House and Haehlen, Gotlieb, House |
| Telegram Building |
| Terminal Sales Building |
| Terwilliger Parkway |
| The Big 'O' |
| The Dalles Civic Auditorium |
| The Dalles Commercial Historic District |
| Thompson, Al and Son's, Feed and Seed Company |
| Thompson, Clark, House |
| Thompson Court Apartments |
| Thompson, John L., House |
| Thompson-Roach Building |
| Tichner, Abraham, House |
| Tigard, John W., House |
| Tiller Ranger Station |
| Torgler, Frederick, Building |
| Tower-Flanagan House |
| Tower, Maj. Morton, House |
| Town Club, The |
| Townley, W. J., House |
| Travelers Home |
| Trenkmann Houses |
| Trevett-Nunn House |
| Trevitt's Addition Historic District |
| Triangle Lake Round Barn |
| Trinity Episcopal Church |
| Trinity Episcopal Church |
| Trinity Place Apartments |
| Troutdale Methodist Episcopal Church |
| Troy Laundry Building |
| Tudor Arms Apartments |
| Tunturi, Fred, House |
| Turner, Frederick, Fourplex |
| Umatilla County Library |
| Umatilla Masonic Lodge Hall |
| Umatilla Site (35 UM 1) |
| Union Block |
| Union Fishermen's Cooperative Packing Company Alderbrook Station |
| Union Main Street Historic District |
| Union Street Railroad Bridge and Trestle |
| Uniontown-Alameda Historic District |
| United Presbyterian Church and Rectory |
| United Presbyterian Church of Shedd |
| University Club |
| Upper Ditch |
| Upper Sandy Guard Station Cabin |
| US Coast Guard Station-Tillamook Bay |
| US Coast Guard Station-Umpqua River, Administration and Equipment Buildings |
| US National Bank Building |
| U.S. Post Office |
| U.S. Post Office and Courthouse |
| U.S. Post Office and Federal Building |
| Vale Drug Store |
| Vale Hotel and Grand Opera House |
| Valley Hospital |
| Valley Theater |
| Van Dellen, John and Murta, House |
| Van Hoevenberg, Henry, Jr., House |
| Van Vleet, Lewis and Elizabeth, House |
| Vaughan, William Hatchette, House |
| Vetter, Herman, House |
| Vey, Joseph, House |
| Victor Point School |
| View Point Inn |
| Villa St. Clara Apartments |
| Villa St. Rose |
| Vinsonhaler Blacksmith Shop |
| Vista Avenue Viaduct |
| Vonder Ahe, Fred, House and Summer Kitchen |
| Voorhies, Amos E., House |
| Wade, William Lincoln, House |
| Waggener, JS and Melinda, Farmstead |
| Wagner Creek School |
| Walden, Nicholas O., House |
| Waldo Block |
| Waldo Cemetery |
| Waldo Chinese Cemetery |
| Waldo Mine |
| Walker, John P., House |
| Walker Naylor Historic District |
| Wallace, John M., Fourplex |
| Walla Walla Valley Traction Company Passenger Station and Powerhouse |
| Wallowa County Chieftain Building |
| Wallowa Ranger Station |
| Warnock, William P., House |
| Warren, Daniel Knight, House |
| Warren, Frank M., House |
| Warren Investment Company Housing Group |
| Wasco Warehouse & Milling Company Hydroelectric Project Historic District |
Data from United States Park Service and Wikidata
