All - Architectural style - Neoclassical architecture
| University Of Virginia Historic District |
| University Settlement House |
| Upham's Corner Market |
| Upland Public Library |
| Upper Fells Point Historic District |
| Upper Oakhurst Historic District |
| Upson County County Courthouse |
| Urban, Fred, House |
| US Bullion Depository, Fort Knox, Kentucky |
| U.S. Courthouse |
| US Courthouse |
| U.S. Courthouse and Post Office |
| U.S. Courthouse and Post Office |
| US Customhouse |
| U.S. Department of Agriculture Administration Building (Boundary Increase and Additional Documentation) |
| US Naval Station |
| 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 |
| US Post Office |
| US Post Office-Anaconda Main |
| U.S. Post Office and Courthouse |
| U.S. Post Office and Courthouse |
| U.S. Post Office and Courthouse |
| U.S. Post Office and Courthouse |
| U.S. Post Office and Courthouse |
| U.S. Post Office and Courthouse |
| U.S. Post Office and Courthouse |
| US Post Office and Courthouse |
| US Post Office and Courthouse |
| US Post Office and Courthouse |
| US Post Office and Courthouse-Havre Main |
| US Post Office and Custom House |
| U.S. Post Office and Customshouse |
| U.S. Post Office and Federal Building |
| US Post Office and Federal Building |
| US Post Office and Federal Building-Delta Main |
| US Post Office and Immigration Station-Nogales Main |
| U.S. Post Office and Office Building |
| US Post Office-Ansonia Main |
| US Post Office-Anthony |
| US Post Office-Augusta |
| US Post Office-Bar Harbor Main |
| US Post Office-Basin Main |
| US Post Office-Beverly Main |
| US Post Office-Bonners Ferry Main |
| US Post Office-Brazil |
| US Post Office Building, Former |
| US Post Office-Burlington |
| US Post Office-Caldwell |
| US Post Office-Canandaigua |
| US Post Office-Central Square |
| US Post Office-Church Street Station |
| US Post Office-Connellsville |
| US Post Office-Corning |
| US Post Office-Cortland |
| US Post Office-Council Grove |
| U.S. Post Office, Courthouse, and Customhouse |
| U.S. Post Office, Court House and Custom House |
| US Post Office-Dillon Main |
| US Post Office-Douglas Main |
| US Post Office-Easthampton Main |
| US Post Office, Ely, Nevada |
| US Post Office-Eureka |
| U.S. Post Office-Federal Building |
| US Post Office-Federal Building-Brenham |
| US Post Office, Former |
| US Post Office-Fredonia |
| U.S. Post Office-Front Street Station |
| US Post Office-Garden City |
| US Post Office-Goodland |
| US Post Office-Greenfield Main |
| US Post Office-Green River |
| US Post Office-Greenwich Main |
| US Post Office-Halstead |
| US Post Office-Helper Main |
| US Post Office-Hempstead |
| US Post Office-Herington |
| US Post Office-Hoisington |
| US Post Office-Horton |
| US Post Office-Hudson |
| US Post Office-Iowa Falls |
| US Post Office-Johnstown |
| US Post Office-Kellogg Main |
| US Post Office-Kemmerer Main |
| US Post Office-Kingman |
| US Post Office-Lindsborg |
| US Post Office-Livingston Main |
| US Post Office-Madison Square Station |
| US Post Office-Malone |
| US Post Office-Medford Main |
| US Post Office-Middleborough Main |
| US Post Office-Monroe |
| US Post Office-Mount Vernon |
Data from United States Park Service and Wikidata
