California - Significance region: Local
| Twohy Building |
| Ukiah Main Post Office |
| Union Church of Dunnigan |
| Union Iron Works Powerhouse |
| Union Iron Works Turbine Machine Shop |
| United States Post Office-Main Street Branch |
| University Art Museum |
| University Heights Junior High School |
| University Heights Water Storage and Pumping Station Historic District |
| University of Southern California Historic District |
| Upland Public Library |
| Upper Klamath River Stateline Archaeological District |
| Uptown Tenderloin Historic District |
| U.S. Appraisers Stores and Immigration Station |
| U.S. Courthouse |
| U.S. Inspection Station/U.S. Custom House |
| U.S. Post Office |
| U.S. Post Office |
| U.S. Post Office |
| U.S. Post Office |
| U.S. Post Office |
| U.S. Post Office and Courthouse |
| US Post Office-Beverly Hills Main |
| US Post Office-Burbank Downtown Station |
| US Post Office-Chico Midtown Station |
| U.S. Post Office, Courthouse and Federal Building |
| US Post Office-Downtown Station |
| US Post Office-Downtown Station |
| US Post Office-El Centro Main |
| US Post Office-Glendale Main |
| US Post Office-Hollywood Station |
| US Post Office-Los Angeles Terminal Annex |
| US Post Office-Marysville Main |
| US Post Office-Napa Franklin Station |
| US Post Office-Oroville Main |
| US Post Office-Redlands Main |
| US Post Office-San Pedro Main |
| US Post Office-Santa Barbara Main |
| US Post Office-Santa Cruz Main |
| US Post Office Station-Spurgeon Station |
| US Post Office-Visalia Town Center Station |
| Utica Mansion |
| Vacaville Town Hall |
| Valencia Hall |
| Valentine, Walter D., Cottage B |
| Vallejo City Hall and County Building Branch |
| Van Buren Place Historic District |
| Van Nuys Branch |
| Van Voorhies House |
| Vasquez Rocks |
| Venice Branch |
| Venice of America House |
| Ventura County Courthouse |
| Ventura Theatre |
| Verlaque, Theophile, House |
| Vermont Square Branch |
| Vernon School |
| Veterans Affairs (VA) Hospital Site |
| Veterans Home of California Chapel |
| Veterans Memorial Building |
| Victoria Avenue |
| View Park Historic District |
| Villa Bonita |
| Villa Carlotta |
| Villa Francesca |
| Villa Mira Monte |
| Villa Montezuma |
| Villa Park School |
| Villa Riviera |
| Villa Verde |
| Virginia Hotel |
| Vista del Arroyo Hotel and Bungalows |
| Vogelsang High Sierra Camp |
| Vollers, Amelia, House |
| Von Pfister General Store |
| Vulcan Mine Historic District |
| Wagner, Anton, Duplex |
| Walker, Mrs. Clinton, House |
| Walkers Orange County Theater |
| Wall Street Mill |
| Walnut Grove Commercial/Residential Historic District |
| Walnut Street School |
| Walstrom, Douglas and Octavia, House |
| Walters Ranch |
| Ware, Henry A., House |
| Warehouse Row |
| Warner Brothers Theatre |
| Warner Valley Ranger Station |
| Warren, Russell, House |
| Wasco Union High School Auditorium |
| Washington Building |
| Washington Court |
| Washington Elementary School |
| Washington Firehouse |
| Washington, Henry, Survey Marker |
| Washington School |
| Washington Union High School |
| Wasserman House |
| Watson Log Cabin |
| Watson School |
Data from United States Park Service and Wikidata
