Oregon - Significance region: Local
| Regent Apartments |
| Reid School |
| Reid's, Wilbur and Evelyn, Alderbrook Lodge |
| Reinhart, Jacques and Amelia, House |
| Reorganized Church of Latter Day Saints |
| Reuter, Dr. J. A., House |
| Rex Arms Apartments |
| Rex Theater |
| Rice Apartments |
| Rice Brothers and Adams Building |
| Rice-Gates House |
| Rice, Gonzalez M. and Maude R., House |
| Rice, Napoleon, House |
| Ricen, Dr. Leo, House |
| Rice, Richard and Helen, House |
| Rice, Silas A., Log House |
| Richardson-Ulrich House |
| Rich Gulch Diggings |
| Rickard, Peter, Farmstead |
| Riddle Ranch |
| Ries-Thompson House |
| Riley-Cutler House |
| Rinehart Building |
| Rippey House |
| River Mill Hydroelectric Project |
| Riverside Community Hall |
| Riverside Park |
| Roba Ranch, The |
| Robbins-Melcher-Schatz Farmstead |
| Robb, James D., House |
| Robertson, Dr. and Mrs. Charles G., House and Garden |
| Rock Creek Methodist Church |
| Rockey, Dr. A. E. and Phila Jane, House |
| Rock Fort Campsite |
| Rock Hill School |
| Rocky Butte Scenic Drive Historic District |
| Roehr, Osco C., House |
| Roesch Building |
| Rogers, George, House |
| Rogue Elk Hotel |
| Rogue River Ranch |
| Rogue Theatre |
| Roome-Stearns House |
| Roosevelt Hotel |
| Root-Banks House |
| Roper, Charles and Theresa, House |
| Roper, Fordyce, House-Southern Oregon Hospital |
| Roseburg Downtown Historic District |
| Rose City Electric Automobile Garage |
| Rose City Golf Clubhouse |
| Rosenberg, Dr. J. J., House |
| Rosenfeld, Walter, Estate |
| Ross-Averill House |
| Ruby, Alfred C. and Nettie, House |
| Rutherford House |
| Ryan, Michael and Mary, Barn |
| Saint Patrick's Roman Catholic Church |
| Salem Civic Center Historic District |
| Salem Downtown State Street-Commercial Street Historic District |
| Salem Southern Pacific Railroad Station |
| Salem Substation, Bonneville Power Administration |
| Salerno Apartments |
| Salmon, W. S., House |
| San Farlando Apartments |
| Santa Barbara Apartments |
| Santiam Pass Ski Lodge |
| Sather, Evan Andreas, House |
| Schaefers Building |
| Schanen-Zolling House |
| Scheurer, William Riley, House |
| Schmidt, Claus and Hannchen, House |
| Schnabel, Charles J. and Elsa, House |
| Schuler Apartment Building |
| Schulmerich, Edward, House |
| Schuster, Charles L., House |
| Scott, Leslie M., House |
| Sea Lyft |
| Seelig-Byler House |
| Selling Building |
| Sellwood Branch YMCA |
| Senate Court Apartments |
| Sengstake Building |
| Sensel, Henry, Building |
| Settlemier, Jesse H., House |
| Seufert House |
| Seven Hundred Five Davis Street Apartments |
| Seward Hotel |
| Sharp, Edward F., Residential Ensemble |
| Shaver-Bilyeu House |
| Shaw-Dumble House |
| Sheffield, John and Sarah, House |
| Shelton-McMurphey House and Grounds |
| Sherman County Courthouse |
| Sherman, Eleanor, House |
| Sherrard-Fenton House |
| Sherwood, A. J., House |
| Shindler, William, House |
| Shinn, Horace J. and Ann S., Cottage |
| Shipley-Cook Farmstead |
| Shipley, U. G., House and Garden |
Data from United States Park Service and Wikidata
