Oregon - Area of significance: Architecture
| Potter, Miles B. and Eleanor, House |
| Potter, Wallace and Glenn, House |
| Poulsen, Johan, House |
| Poultry Building and Incubator House |
| Povey, John E. G., House |
| Powell, Curtis W., House |
| Powers, Ira F., Building |
| Pracht, Humboldt, House |
| Prager-Lombard House |
| P Ranch |
| Preston, Charles, House |
| Price, O. L., House |
| Prince, Thomas, House |
| Prospect Hotel |
| Psi Alpha Chapter, Chi Omega House |
| Public Service Building and Garage |
| Queen of Angels Priory |
| Raabe, Capt. George, House |
| Railway Exchange Building and Huber's Restaurant |
| Ralston, John and Lottie, Cottage |
| Ralston, John, House |
| Rand, Ed, House |
| Ray, Harold Wass, House |
| Raymond, Jessie M., House |
| Reddy, Dr. John F. and Mary, House |
| Redmond Downtown Historic District |
| Redwoods Hotel |
| Reed-Cobb-Bowser House and Barn |
| Reed Opera House and McCornack Block Addition |
| Reed, Samuel G., House |
| Reese and Redman General Merchandise Store |
| 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 |
| 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 |
| Rickard, Peter, Farmstead |
| Riddle Ranch |
| Riley-Cutler House |
| Rim Village Historic District |
| Rippey House |
| River Mill Hydroelectric Project |
| Riverside Community Hall |
| 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 Hill School |
| Rock Point Hotel |
| Roesch Building |
| Rogers, George, House |
| Rogue Elk Hotel |
| Rogue Theatre |
| Roome-Stearns House |
| Roosevelt Hotel |
| Roper, Charles and Theresa, House |
| Roper, Fordyce, House-Southern Oregon Hospital |
| Roseburg Downtown Historic District |
| Roseburg, Oregon, National Guard Armory |
| Roseburg Veterans Administration Hospital Historic District |
| Rosenberg, Dr. J. J., House |
| Rosenfeld, Walter, Estate |
| Ross-Averill House |
| Ruby, Alfred C. and Nettie, 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 |
| Saling, Isham, House |
| 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 |
Data from United States Park Service and Wikidata
