Oregon - Area of significance: Architecture
| St. John's Episcopal Church |
| St. John's Episcopal Church |
| St. Johns Signal Tower Gas Station |
| St. John the Evangelist Roman Catholic Church |
| St. Mary's Roman Catholic Church |
| Stokes, Francis Marion, Fourplex |
| Store Gulch Guard Station No. 1020 |
| Storey, George Lincoln, House |
| Stover, B. A. and Ruth, House |
| St. Patrick's Roman Catholic Church and Rectory |
| St. Paul Historic District |
| St. Paul Roman Catholic Church |
| St. Peter's Roman Catholic Church |
| St. Peter's Roman Catholic Church |
| Straight, Hiram A., House |
| Stratton, C. C., House |
| Stratton-Cornelius House |
| Strong, Alice Henderson, House |
| St. Thomas' Episcopal Church |
| Sumpter Valley Railway Passenger Station |
| Superintendent's House |
| Supervisor's House No. 1001 |
| Supreme Court and Library Building |
| Sutherlin Bank Building |
| Swanson, Norman and Frances, House |
| Swedish Evangelical Mission Covenant Church |
| Sweek, John and Maria, House |
| Sweeney, Dr. Charles T. and Mary, House |
| Sweeney, Straub and Dimm Printing Plant |
| 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, Fred E., House |
| Taylor, George, House |
| Taylor, Jack, House |
| Taylor, Peter, House and Haehlen, Gotlieb, House |
| Telegram Building |
| Temple Beth Israel |
| Terminal Sales Building |
| The Dalles Civic Auditorium |
| 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 |
| Tillamook Rock Lighthouse |
| Tiller Ranger Station |
| Timberline Lodge |
| 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 Place Apartments |
| Troutdale Methodist Episcopal Church |
| Troy Laundry Building |
| Tualatin Academy |
| Tudor Arms Apartments |
| Tunturi, Fred, House |
| Turner, Frederick, Fourplex |
| Umatilla County Library |
| Umatilla Masonic Lodge Hall |
| Union Block |
| Union Creek Historic District |
| Union Main Street Historic District |
| Union Station |
| Uniontown-Alameda Historic District |
| United Presbyterian Church and Rectory |
| United Presbyterian Church of Shedd |
| United States Post Office (Scappoose) |
| Unity Ranger Station |
| University Club |
| University of Oregon Library and Memorial Quadrangle |
| University of Oregon Museum of Art |
| Upper Sandy Guard Station Cabin |
| US Coast Guard Station-Tillamook Bay |
| US Coast Guard Station-Umpqua River, Administration and Equipment Buildings |
| U.S. Courthouse |
| U.S. Customhouse |
| US National Bank Building |
| U.S. Post Office |
| U.S. Post Office |
| US Post Office |
| US Post Office |
| US Post Office |
| U.S. Post Office and Courthouse |
| US Post Office and Courthouse |
| US Post Office and Custom House |
Data from United States Park Service and Wikidata
