Rhode Island - Criteria: C (architecture/engineering)
| Old Congregational Church |
| Old Harbor Historic District |
| Old Narragansett Cemetery |
| Old Narragansett Church |
| Olney, Capt. Stephen, House |
| Olney Street-Alumni Avenue Historic District |
| Ontario Apartments |
| Oriental Mills |
| Osborn-Bennett Historic District |
| Our Lady of Lourdes Church Complex |
| Paine House |
| Palmer-Northrup House |
| Paradise School |
| Parkis-Comstock Historic District |
| Pascoag Grammar School |
| Patterson Brothers Commercial Building and House |
| Pawtucket Armory |
| Pawtucket City Hall |
| Pawtucket Congregational Church |
| Pawtucket Elks Lodge Building |
| Pawtucket Post Office |
| Pawtucket Times Building |
| Pawtucket West High School |
| Pawtuxet Valley Dyeing Company |
| Pawtuxet Village Historic District |
| Payne, Charles, House |
| Peace Dale Historic District |
| Pearce, Nathaniel, House |
| Pekin Street Historic District |
| Perkins Buildings |
| Perry, Commodore Oliver, Farm |
| Perry Homestead Historic District |
| Perry Mill |
| Phillipsdale Historic District |
| Phillips Insulated Wire Company Complex |
| Pierce, Joseph, Farm |
| Pine Street Historic District |
| Pitcher-Goff House |
| Plain Farm House |
| Plum Beach Lighthouse |
| Pocasset Worsted Company Mill |
| Point Judith Lighthouse |
| Poirier's Diner |
| Pomham Rocks Light Station |
| Pontiac Mills |
| Poplar Point Lighthouse |
| Poppasquash Farms Historic District |
| Portsmouth Friends Meetinghouse Parsonage and Cemetery |
| Potter-Collyer House |
| Potter-Remington House |
| Power Street-Cooke Street Historic District |
| Providence-Biltmore Hotel |
| Providence City Hall |
| Providence Dyeing, Bleaching, Calendring Company |
| Providence Fruit and Produce Warehouse Company Building |
| Providence Gas Company Purifier House |
| Providence Jewelry Manufacturing Historic District |
| Providence Lying-In Hospital |
| Providence Steel and Iron Company Complex |
| Providence Telephone Company |
| Prudence Island Lighthouse |
| Pullen Corner School |
| Quality Hill Historic District |
| Ram Point |
| Rathbun House |
| Red House |
| Redwood Library |
| Reynolds, Joseph, House |
| Rhode Island Hospital Trust Building |
| Rhode Island Medical Society Building |
| Rhode Island State Airport Terminal |
| Rhode Island Statehouse |
| Rhode Island Tool Company |
| Rhodes, Christopher, House |
| Rhodes-on-the Pawtuxet Ballroom and Gazebo |
| Rhodes Street Historic District |
| Rice City Historic District |
| Richmond Paper Company Mill Complex |
| Riverside Cemetery |
| Rochambeau Branch-Providence Public Library |
| Rochambeau Worsted Company Mill |
| Rodman, Gen. Isaac Peace, House |
| Rogers, Joseph, House |
| Roger Williams Park Historic District |
| Rose, Benoni, House |
| Rosecliff |
| Rosedale Apartments |
| Rose Land Park Plat Historic District |
| Royal Mill Complex |
| Rumford Chemical Works and Mill House Historic District |
| Rumford Historic District |
| Russell, Joseph and William, House |
| Saint Martin's Church |
| Saint Thomas Episcopal Church and Rectory |
| Sakonnet Light Station |
| Sanford, Esbon, House |
| Saunderstown Historic District |
| Sayles, Deborah Cook, Public Library |
| Saylesville Historic District |
| Saylesville Meetinghouse |
Data from United States Park Service and Wikidata
