District of Columbia - Area of significance: Architecture
| National Cathedral, The |
| National Geographic Society Headquarters |
| National Metropolitan Bank Building |
| National Museum of Natural History |
| National Portrait Gallery |
| National Presbyterian Church |
| National Saving And Trust Company |
| National Union Building |
| Newton Theater |
| Nixon-Mounsey House, (1949-1976) |
| Northeast Savings Bank |
| Northumberland Apartments |
| Oak Hill Cemetery Chapel |
| Observatory Hill |
| Octagon, The |
| Old Chinese Legation |
| Old Engine Company No. 6 |
| Old Naval Hospital |
| Old Post Office and Clock Tower |
| Old Stone House |
| Old Swedish Ambassador’s Residence |
| Old Woodley Park Historic District |
| On Leong Chinese Merchants Association |
| Oriental Building Association No. 6 Building |
| O Street Market |
| Owens, Isaac, House |
| Page, Thomas Nelson, House |
| Pan American Union |
| Park Road Courts |
| Park Tower |
| Park View Playground and Field House |
| Park View School |
| Park Vista and Pine Manor Apartments |
| Peirce Mill |
| Penland, W. H., & Company |
| Pennsylvania Avenue National Historic Site |
| Pension Building |
| Perna Brothers' Chesapeake Street Houses |
| Petworth Branch Library |
| Petworth Gardens |
| Peyser Building-Security Savings and Commercial Bank |
| Phillips, Duncan, House |
| Pierce-Klingle Mansion |
| Pierce Still House |
| Pink Palace |
| Plymouth, The |
| Plymouth Theater |
| Ponce de Leon Apartment Building |
| Potomac Boat Club |
| Potomac Electric Power Company Substation No. 13 |
| Potomac Electric Power Company Substation No. 25 |
| President's House, Gallaudet College |
| President's Office, George Washington University |
| Prince Hall Masonic Temple |
| Prospect House |
| Quality Hill |
| Quarters A, Washington Navy Yard |
| Quarters B, Washington Navy Yard |
| Railroad Retirement Board Building |
| Randall Junior High School |
| Randle Highlands School |
| Real Estate Trust Building-Continental Trust Building |
| Renwick Museum |
| Rhodes' Tavern |
| Riggs National Bank |
| Riggs National Bank, Washington Loan And Trust Company Branch |
| Riggs-Tompkins Building |
| Ringgold-Carroll House |
| Rock Creek Church Yard and Cemetery |
| Rock Creek Park Historic District |
| Roosevelt Apartment Building |
| Roosevelt, Theodore, Senior High School |
| Rosedale |
| Saint James Mutual Homes |
| Saul, B.F., Building |
| Scheele-Brown House |
| Schlitz Brewing Company Washington Branch and National Geographic Society Warehouse |
| Schneider Triangle |
| Sears, Roebuck and Company Department Store |
| Second National Bank |
| Sedgwick Gardens |
| Seventh Street Savings Bank |
| Sewall-Belmont House National Historic Site |
| Shaw Junior High School |
| Sheridan-Kalorama Historic District |
| Sixteenth Street Historic District |
| Slater, John Fox, Elementary School |
| Slayton, William L., House |
| Smithsonian Building |
| Smothers Elementary School |
| Social Security Administration Building |
| Southeast Branch Library |
| Southern Aid Society-Dunbar Theater Building |
| Southern Railway Building |
| Spencer Carriage House and Stable |
| Springland |
| Square 1500 |
| St. Aloysius Catholic Church |
| Steedman-Ray House |
| St. Elizabeths Hospital |
Data from United States Park Service and Wikidata
