Oregon - Criteria: C (architecture/engineering)
| Shively-McClure Historic District |
| Sholes, Albert S., House |
| Shorey, Charles, House |
| Short Bridge |
| Shute-Meierjurgen Farmstead |
| Silcox Hut |
| Silver Creek Youth Camp-Silver Falls State Park |
| Silver Falls State Park Concession Building Area |
| Silverton Commercial Historic District |
| Sinnott Memorial Building No. 67 |
| Siskiyou Smokejumper Base |
| Siuslaw River Bridge No. 01821 |
| Smeede Hotel |
| Smith, Alfred H. and Mary E., House |
| Smith, Alvin T., House |
| Smith, Blaine, House |
| Smith, Henry Clay, House |
| Smith, James Alexander, and Elmarion, Barn and Lame-Smith House |
| Smith, Milton W., House |
| Smith, N. P., Pioneer Hardware Store |
| Smith, Percy A., House |
| Smithson and McKay Brothers Blocks |
| Smith, Walter V., House |
| Soap Creek School |
| Sod House Ranch |
| Southern Pacific Passenger Depot |
| Southern Pacific Railroad Passenger Station and Freight House |
| South Main Street Commercial Historic District |
| South Oakdale Historic District |
| South Park Blocks |
| South Portland Historic District |
| Sovereign Hotel |
| Spalding Building |
| Spencer, Arthur Champlin, and Margaret Fenton Spencer House |
| Spies-Robinson House |
| Spokane, Portland and Seattle Railroad Warehouse |
| Spokane, Portland and Seattle Railway Steam Locomotive |
| Sprague-Marshall-Bowie House |
| Springfield General Hospital |
| Spring Valley Presbyterian Church |
| Spring Valley School |
| Staples, Norris, House |
| State Library of Oregon |
| St. Elizabeth Hospital (Old) |
| Stevens Building |
| Stevens, Charles, House |
| Stewart Bridge |
| St. Helens Downtown Historic District |
| St. James Episcopal Church |
| St. James Lutheran Church |
| 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 |
| Stover, B. A. and Ruth, House |
| St. Patrick's Roman Catholic Church and Rectory |
| St. Paul Roman Catholic Church |
| St. Peter's Roman Catholic Church |
| St. Peter's Roman Catholic Church |
| Stratton-Cornelius House |
| Strong, Alice Henderson, House |
| St. Thomas' Episcopal Church |
| Sumpter Valley Railway Passenger Station |
| Superintendent's House |
| Supervisor's House No. 1001 |
| Sutherlin Bank Building |
| Swanson, Norman and Frances, House |
| Swedish Evangelical Mission Covenant Church |
| Sweek, John and Maria, House |
| Tanner, Albert H., House |
| Tannler-Armstrong House |
| Tarpley, Louis and Bessie, House |
| Taylor, Dr. W.R. and Eunice, House |
| Taylor, Fred E., House |
| Taylor, George, House |
| Telegram Building |
| Temple Beth Israel |
| Ten Mile Creek Bridge No. 01181 |
| Terminal Sales Building |
| The Dalles Civic Auditorium |
| Thomas Creek-Gilkey Covered Bridge |
| Thomas Creek-Shimanek Covered Bridge |
| Thompson, Al and Son's, Feed and Seed Company |
| Thompson Court Apartments |
| Thompson, John L., House |
| Tichner, Abraham, House |
| Tigard, John W., House |
| Tillamook Rock Lighthouse |
| Tiller Ranger Station |
| Timberline Lodge |
| Torgler, Frederick, Building |
| Town Club, The |
| Travelers Home |
| Trevett-Nunn House |
| Trevitt's Addition Historic District |
| Triangle Lake Round Barn |
| Trinity Episcopal Church |
| Trinity Place Apartments |
Data from United States Park Service and Wikidata
