District of Columbia - Area of significance: Architecture
| Stevens, Thaddeus, School |
| St. John's Church |
| St. Joseph’s Seminary |
| St. Mark's Church |
| St. Mary's Episcopal Church |
| St. Matthew's Cathedral And Rectory |
| Stockton Hall |
| Stone, Robert and Lillie May, House |
| St. Paul's College |
| St. Paul's Episcopal Church |
| Strivers' Section Historic District |
| Strong, Hattie M., Residence Hall |
| Studio House |
| Sulgrave Club |
| Sumner, Charles, School |
| Sun Building |
| Surratt, Mary E., House |
| Syphax, William, School |
| Takoma Park Historic District |
| Tenth Precinct Station House |
| Terminal Refrigerating and Warehouse Company |
| Texas Gardens Apartments |
| Thomas Jefferson Memorial |
| Tiber Island |
| Tilden Hall |
| Tivoli Theater |
| Tower Building |
| Town Center East |
| Trinity Towers |
| Truck Company F |
| Truck House No. 13 |
| True Reformer Building |
| Tucker House and Myers House |
| Tudor Place |
| Twin Oaks |
| Twin Oaks Playground and Field House |
| Uline Ice Company Plant and Arena Complex |
| Union Market Historic District |
| Union Trust Building |
| United Brotherhood of Carpenters and Joiners-Local 132 |
| United Mine Workers of America |
| United States Daughters of 1812, National Headquarters |
| University Club of Washington, DC |
| Uptown Theatre |
| U.S. Capitol Gatehouses And Gateposts |
| US Chamber of Commerce Building |
| U.S. Civil Service Commission Building |
| US Courthouse-District of Columbia |
| U.S. Court Of Military Appeals |
| U.S. Department of Agriculture Administration Building |
| U.S. Department of Agriculture Cotton Annex |
| US Department of Agriculture South Building |
| U.S. Department of Housing and Urban Development |
| U.S. Department of State Building |
| US Department of the Interior Building |
| U.S. Department of the Treasury |
| US General Accounting Office Building |
| U.S. Marine Corps Barracks and Commandant's House |
| U.S. Post Office Department Mail Equipment Shops |
| US Public Health Service Building |
| U.S. Tax Court |
| Van Ness Mausoleum |
| Van View |
| Vigilant Firehouse |
| Virginia Interlocking Control Tower |
| Waggaman-Ray Commercial Row |
| Walde-Carter House |
| Walsh Stable |
| Walter Reed Army Medical Center (WRAMC) Historic District |
| Warder-Totten House |
| Wardman Flats |
| Wardman Park Annex and Arcade |
| Wardman Park Annex and Arcade |
| Wardman Row |
| Washington and Georgetown Railroad Car House |
| Washington Canoe Club |
| Washington Club |
| Washington Heights Historic District |
| Washington Monument |
| Washington Navy Yard |
| Washington Railway and Electric Company Garage |
| Watergate |
| Watterston House |
| Webster, Marjorie, Junior College Historic District |
| Western High School |
| Westory Building |
| Wetzell-Archbold Farmstead |
| Wetzel, Margaret, House |
| Wheat Row |
| Whitelaw Hotel |
| White-Meyer House |
| Whittemore House |
| Wiley, Emily, House |
| Willard Hotel |
| Wilson, James Ormand, Normal School |
| Wire Building |
| Woodhull, Maxwell, House |
| Woodrow Wilson High School |
| Woodward and Lothrop Service Warehouse |
| Wyoming Apartments |
Data from United States Park Service and Wikidata
