All - Constructed - 1910–1919
| Prescott Commons |
| President's House, Marion Institute |
| Price, Fred, Bungalow |
| Princess Theatre |
| Prospect Peak Fire Lookout |
| Provost, Arthur, Three-Decker |
| Public Service Building |
| Punta Gorda Light Station |
| Purdy, Rachel Kilpatrick, House |
| Pyle-National Company Plant |
| Pythias Lodge Building |
| Quantico Marine Corps Base Historic District |
| Quigley Preparatory Seminary |
| Quitman Depot |
| Quivey, M. B., House |
| Racine Elks Club, Lodge No. 252 |
| Raleigh Banking and Trust Company Building |
| Raleigh Electric Company Power House |
| Ramsey County Poor Farm Barn |
| Rapid City Garage |
| Rattlesnake Canyon Bridge |
| Raymond Grain Elevators Historic District |
| Reading Town Hall |
| Real Estate Trust Building-Continental Trust Building |
| Rector Hotel |
| Refugio County Courthouse |
| Reid School |
| Reiger, Fred, Houses |
| Remmel Apartments |
| Remmel Apartments |
| Remmel Flats |
| Republic Building |
| Rex Arms Apartments |
| Reynolds, John T. and Henry T., Jr., House |
| Rialto Theater |
| Rice Brothers and Adams Building |
| Rice County Courthouse |
| Rice Hall |
| Richardson Building |
| Richardson Houses Historic District |
| Richmond Carnegie Library |
| Richter, Charles Samuel, House |
| Ricker, B. J., House |
| Rickwood Field |
| Ridenour-Baker Grocery Company Building |
| Ridge Boulevard Apartments |
| Ridgely Apartments |
| Ridge Manor |
| Ridge Route, Old |
| Ridyard, Albert, Three-Decker |
| Ridyard, B. E., Three-Decker |
| Ringling, Al, Theatre |
| Ripple House |
| Ritch-Carter-Martin House |
| Riverbank Laboratories |
| River Road Covered Bridge |
| Riverside Concrete Company-Lamont's Market |
| Roach, W.R., Cannery Warehouse and Office Building |
| Roanoke City Firehouse No. 6 |
| Roberts-Banner Building |
| Roberts County Courthouse |
| Roberts House |
| Robeson, Paul, Home |
| Robidoux Creek Pratt Truss Bridge |
| Robinett, S.D., Building |
| "Robinson, John Roosevelt ""Jackie"", House" |
| Robinson, Lizzie, House |
| Rockford Woman’s Club |
| Rock Hall |
| Rock Island Depot |
| Rock Island Depot |
| Rock Island Passenger Station |
| Rock Island Passenger Station |
| Rockland Railroad Station |
| Rockledge |
| Rock Ledge |
| Rockwell Field |
| Rocky Mountain Bell Telephone Company Building |
| Rolvaag, O. E., House |
| Roma Bakery |
| Roper, Charles and Theresa, House |
| Roseau County Courthouse |
| Rosebud County Courthouse |
| Roseburg, Oregon, National Guard Armory |
| Rose Realty-Securities Building |
| Roseville Bridge |
| Rosewood Park |
| Rothschild Pavilion |
| Round Barn |
| Royal-Crumpler-Parker House |
| Royal Theater |
| Roycemore School |
| Rudolph, Paul, Sarasota High School Addition |
| Rudy-Kodzoff House |
| Rufwud Cottage |
| Rundle Building |
| Russian Cemetery |
| Russian Orthodox Cathedral of the Transfiguration of Our Lord |
| Sabine Hall |
| Sacramento Bank Building |
Data from United States Park Service and Wikidata
