Oregon - Area of significance: Engineering
| Antelope Creek Covered Bridge |
| Army Corps of Engineers Road System |
| Ashland Municipal Powerhouse |
| Belknap Bridge |
| Big Creek Bridge No. 01180 |
| Birch Creek Ranch Historic Rural Landscape |
| Bonneville Dam Historic District |
| Brick House Beautiful |
| Broadway Bridge |
| Brown, Charles and Martha, House |
| Buehner, Philip, House |
| Burnside Bridge |
| Cape Creek Bridge No. 01113 |
| Cascade Locks Marine Park |
| Chambers Bridge |
| Chitwood Bridge |
| Columbia River Highway Historic District |
| Coos Bay Bridge NO. 01823 |
| Coyote Creek Bridge |
| Crabtree Creek-Hoffman Covered Bridge |
| Crawfordsville Bridge |
| Crook, Charles, House |
| Currin Bridge |
| Deadwood Creek Bridge |
| Depoe Bay Bridge No. 01388 |
| Dorena Bridge |
| Ernest Bridge |
| Fisher School Bridge |
| Fort Stevens |
| Fremont Powerhouse |
| Gallon House Bridge |
| Gatehouse, Portland City Reservoir No. 2 |
| Gearhart, John Neal and Dora, House |
| Goodpasture Bridge |
| Grave Creek Bridge |
| Hannah Bridge |
| Harris Bridge |
| Hawthorne Bridge |
| Hayden Bridge |
| Hughes Flying Boat (H-4 Hercules) |
| Hull-Oakes Lumber Company |
| Irish Bend Covered Bridge No. 14169 |
| Jefferson Substation |
| Lake Creek Bridge |
| Larwood Bridge |
| Leaburg Hydroelectric Project Historic District |
| Lost Creek Bridge |
| Lowell Bridge |
| McKee Bridge |
| McKenzie Highway Historic District |
| McLoughlin Promenade |
| Mertz, C.W., Rental House #2 |
| Mill City Southern Pacific Rail Road (SPRR) Bridge |
| Milo Academy Bridge |
| Monteith Historic District |
| Morrison Bridge |
| Mosby Creek Bridge |
| Mount Tabor Park Reservoirs Historic District |
| North Fork of the Yachats Bridge |
| Northwestern Electric Company-Alberta Substation |
| Office Bridge |
| Oregon Pacific Railroad Linear Historic District |
| Oregon Railway and Navigation Company Bridge |
| Owyhee Dam Historic District |
| Pacific Hardware and Steel Company Warehouse |
| Parsons, John and Elsie, House |
| Parvin Bridge |
| Pengra Bridge |
| Portland and Southwestern Railroad Tunnel |
| PORTLAND (Steam Tug) |
| Portland Zoo Railway Historic District |
| PT-658 (motor torpedo boat) |
| Rim Drive Historic District |
| Ritner Creek Bridge |
| River Mill Hydroelectric Project |
| Rock O' the Range Bridge |
| Rocky Butte Scenic Drive Historic District |
| Rocky Creek Bridge No. 01089 |
| Rogue River Bridge No. 01172 |
| Salem Substation, Bonneville Power Administration |
| Sandy Creek Bridge |
| Short Bridge |
| Siuslaw River Bridge No. 01821 |
| Spokane, Portland and Seattle Railway Steam Locomotive |
| Stewart Bridge |
| Taylor, Dr. W.R. and Eunice, House |
| Ten Mile Creek Bridge No. 01181 |
| Thomas Creek-Gilkey Covered Bridge |
| Thomas Creek-Shimanek Covered Bridge |
| Tillamook Rock Lighthouse |
| Trevitt's Addition Historic District |
| Umpqua River Bridge No. 01822 |
| Union Street Railroad Bridge and Trestle |
| Unity Bridge |
| US Naval Air Station Dirigible Hangar B |
| USS BLUEBACK (submarine) |
| USS LCI-713 (Landing Craft) |
| Vista Avenue Viaduct |
| Wasco Warehouse & Milling Company Hydroelectric Project Historic District |
| Washington Park Reservoirs Historic District |
Data from United States Park Service and Wikidata
