All - Constructed - 1910–1919
| Union Iron Works Powerhouse |
| Union Iron Works Turbine Machine Shop |
| Union National Bank Building |
| Union Pacific Railroad Depot |
| Union Railroad Station |
| Union Station |
| Union Station |
| Union Station |
| Union Station (Boundary Increase) |
| Union Station Plaza and Columbus Fountain |
| Union Trust Building |
| United States Post Office and Courthouse |
| United States Post Office and Court House |
| United States Post Office-Belvidere |
| University Bridge |
| University Hall, Cleveland State University |
| Untermyer Park |
| Upham's Corner Market |
| Upland Public Library |
| Upper Twin Falls Bridge |
| Upsilon Alpha Chapter House |
| Ursuline Academy |
| U.S. Army Supply Base New Orleans |
| U.S. Arsenal (Arsenal Technical High School) |
| U.S. General Post Office |
| U.S. Post Office |
| U.S. Post Office |
| U.S. Post Office |
| U.S. Post Office |
| U.S. Post Office |
| U.S. Post Office |
| U.S. Post Office |
| U.S. Post Office |
| U.S. Post Office |
| US Post Office |
| US Post Office |
| US Post Office |
| U.S. Post Office and Annex |
| U.S. Post Office and Courthouse |
| US Post Office and Courthouse |
| U.S. Post Office and Customshouse |
| US Post Office-Ansonia Main |
| US Post Office-Brazil |
| US Post Office-Dover Main |
| US Post Office-Miles City Main |
| US Post Office-Monroe |
| US Post Office-Old Town Main |
| US Post Office-Olean |
| US Post Office-Vancouver Main |
| US Post Office-Wahpeton |
| US Post Office-Woburn Center Station |
| Valencia, Jesus, House |
| Valmora Sanatorium Historic District |
| Val Verde |
| Val Verde Hotel |
| Van Allen Store |
| Van Hagen, George E., House |
| VanHuys, Andrew B., Round Barn |
| Van Meter Hall |
| Vann, Aldridge H., House |
| Vaughn, H. G., House |
| Viall Lodge |
| Vici M-K-T Depot |
| Villa Del Mar |
| Village Hall |
| Villisca National Guard Armory |
| Vinsonhaler Blacksmith Shop |
| Virginia Episcopal School |
| Virginia High School |
| Virginia-Rainy Lake Lumber Company Manager's Residence |
| Vista House |
| Vizcaya |
| Wabek Consolidated School |
| Wadena Fire and City Hall |
| Wading River Radio Station |
| Wagner House |
| Waits River Schoolhouse |
| Wakely Mountain Fire Observation Station |
| Wakonda State Bank |
| Walker, William Hall, Gymnasium |
| Walnut Canyon National Monument |
| Walnut Grove School |
| Walter's Hot Dog Stand |
| Walthall County Courthouse and Jail |
| Walworth County Courthouse |
| Wasco Union High School Auditorium |
| Washington. Booker T., High School Auditorium |
| Washington, Margaret Murray, School |
| Washovia Bank and Trust Company Building |
| Wasserman House |
| Waterloo Ridge Menigheds Kirke og Kirkegard Historic District |
| Watertown High School, Old |
| Watertown Masonic Temple |
| Waterville High School |
| Waupaca Free Public Library |
| Waverly Bridge |
| Waverly Hills Tuberculosis Sanitarium Historic Buildings |
| WCF & N Center Point Depot and Substation |
| Weber Implement and Automobile Company Building |
| Webster, Noah, Memorial Library |
Data from United States Park Service and Wikidata
