Private owner

Turner-Ledbetter House (Pulaski County, Arkansas)
Turner-Todd Motor Company (Mobile County, Alabama)
Turner-White-McGee House (Jasper County, Texas)
Turney--Hutchins House (Trousdale County, Tennessee)
Turnpike House (Essex County, Massachusetts)
Demolished 1984
Turnwold (Putnam County, Georgia)
Turpin Grain Elevator (Beaver County, Oklahoma)
Turpin-Kofler-Buja House (Orleans Parish, Louisiana)
Turrentine Historic District (Etowah County, Alabama)
Turrets, The (Hancock County, Maine)
Turtle Bay Gardens Historic District (New York County, New York)
Turtle House (Columbia County, New York)
Tuscawilla (Greenbrier County, West Virginia)
Tusculum (Amherst County, Virginia)
Tusculum (Warren County, North Carolina)
Tusculum (Mercer County, New Jersey)
Tusculum College Historic District (Greene County, Tennessee)
Tuscumbia Landing Site (Colbert County, Alabama)
Tuthill, David, Farmstead (Suffolk County, New York)
Tuthill, Jesse and Ira, House (Suffolk County, New York)
Tuthill--Green House (Cayuga County, New York)
Tuthilltown Gristmill (Ulster County, New York)
Tuton's Drugstore (Oklahoma County, Oklahoma)
Tutt Building (Pueblo County, Colorado)
Tuttle House (Knox County, Ohio)
Tuttle House (Morris County, New Jersey)
Tuttle, Donald D., House (Merrimack County, New Hampshire)
Tuttle-Folsom House (Sanpete County, Utah)
Tuxedo Park Christian Church (St. Louis County, Missouri)
TWA Administrative Offices Building (Platte County, Missouri)
A four-story building, executed in the Modern Movement Miesian style
TWA Corporate Headquarters' Building (Jackson County, Missouri)
Twaddell's Mill and House (Delaware County, Pennsylvania)
Twaddle Mansion (Washoe County, Nevada)
Twain, Mark, House (Hartford County, Connecticut)
Tway House (Jefferson County, Kentucky)
Tweddle Farmstead (Orange County, New York)
Twelve Oaks (Bell County, Texas)
Twelve Points Historic District (Vigo County, Indiana)
Twentieth Century Club of Lansdowne (Delaware County, Pennsylvania)
Twentieth Century Theatre (Hamilton County, Ohio)
Twentieth Street Historic District (Los Angeles County, California)
Twenty-One Ranchhouse (Nez Perce County, Idaho)
Twilight Park Historic District (Greene County, New York)
Twin Beach AME Church (Baldwin County, Alabama)
Twin Creek Ranch (Teller County, Colorado)
Twin Falls Canal Company Building (Twin Falls County, Idaho)
Twin Gates Carriage House (Jefferson County, Kentucky)
Twin Houses (Currituck County, North Carolina)
Twin Maples (Union County, New Jersey)
Twin Oaks (Hamilton County, Ohio)
Twin Oaks (Meriwether County, Georgia)
Twin Oaks (Washington, District of Columbia)
Twin Oaks (Anne Arundel County, Maryland)
Twin Oaks Farm (Bedford County, Virginia)
Twin Peaks Sports (Custer County, Idaho)
Twin Pines Lodge and Cabin Camp (Fremont County, Wyoming)
Twin Tower Sanctuary (Cook County, Illinois)
Twin Trees Farm (Bucks County, Pennsylvania)
Twinehurst American Optical Company Neighborhood (Worcester County, Massachusetts)
Twining Farm (Bucks County, Pennsylvania)
Twining Laboratories (Fresno County, California)
Twinsburg Congregational Church (Summit County, Ohio)
Twinsburg Institute (Summit County, Ohio)
Twitchell House (Jefferson Davis Parish, Louisiana)
Twitchell, Ginery, House (Norfolk County, Massachusetts)
Twitchell, Joseph, House (Middlesex County, Massachusetts)
Two Bayou Methodist Church and Cemetery (Ouachita County, Arkansas)
Two Cent Bridge (Kennebec County, Maine)
Wire suspension bridge over Kennebec River built as a pedestrian bridge
Two Medicine Fight Site (Pondera County, Montana)
Two Pierpont Circle (Chatham County, Georgia)
Twohy Building (Santa Clara County, California)
Tye House (Holmes County, Mississippi)
Tygarts Valley Church (Randolph County, West Virginia)
Tyler Block (Jefferson County, Kentucky)
Tyler Grocery Company (Smith County, Texas)
Tyler Hotel (Jefferson County, Kentucky)
Tyler House (Bell County, Texas)
Tyler, Frank J., House (Middlesex County, Massachusetts)
Tyler, John, House (New Haven County, Connecticut)
Tyler, Solomon, House (New Haven County, Connecticut)
Tyler--Southerland House (Faulkner County, Arkansas)
Tyler-Muldoon House (Jefferson County, Kentucky)
Tyn Head Court (Kent County, Delaware)
Tynes House (Lawrence County, Mississippi)
Tyng, Col. Jonathan, House (Middlesex County, Massachusetts)
Burned in 1981
Tyni Building (Cowlitz County, Washington)
Tyrconnell (Baltimore County, Maryland)
Tyree Building (Fulton County, Georgia)
Tyree Stone Tavern (Fayette County, West Virginia)
Tyrell House (Mohave County, Arizona)
Tyringham Shaker Settlement Historic District (Berkshire County, Massachusetts)
Tyro Mill (Nelson County, Virginia)
Tyro Tavern (Davidson County, North Carolina)
Tyson Family Commercial Building (Ouachita County, Arkansas)
Tyson House (Washoe County, Nevada)
Tyson Junior High School (Knox County, Tennessee)
Tyson United Methodist Church (Ripley County, Indiana)
Tyson-Maner House (Montgomery County, Alabama)
U-505 (IX C U-Boat) (Cook County, Illinois)
U. G. Shipley House and Garden (Marion County, Oregon)
U. J. Cleveland House (Mobile County, Alabama)
U. L. Hickmon Hardware Store (White County, Arkansas)
U. M. Rose School (Pulaski County, Arkansas)
U. P. Clardy House (Collin County, Texas)
U. S. Post Office (Union County, Iowa)
U.S. Car. No. 1 (Broward County, Florida)
U.S. Coal and Coke Company (McDowell County, West Virginia)
U.S. Courthouse and Post Office (Monroe County, Mississippi)
U.S. Customhouse (York County, Maine)
U.S. Customhouse (Niagara County, New York)
U.S. Indian Industrial School (Nance County, Nebraska)
U.S. Life-Saving Station No. 35 (Cape May County, New Jersey)
U.S. National Bank (Galveston County, Texas)
U.S. National Bank Building (Clark County, Washington)
U.S. Post Office (Florence County, South Carolina)
U.S. Post Office (Morrow County, Ohio)
U.S. Post Office (Lancaster County, Pennsylvania)
U.S. Post Office and Courthouse (Weber County, Utah)
U.S. Post Office--Alexandria (Douglas County, Minnesota)
U.S. Soldiers' and Airmen's Home (Washington, District of Columbia)
U.S. Weather Bureau Building (Taylor County, Texas)
U.S.S. CONSTELLATION (Baltimore, Maryland)
U.S.S. HAZARD and U.S.S. MARLIN (Douglas County, Nebraska)
U.S.S. JOSEPH P. KENNEDY JR. (DD-850) (Bristol County, Massachusetts)
U.S.S. LING (Bergen County, New Jersey)
U.S.S. LIONFISH (Bristol County, Massachusetts)
U.S.S. OLYMPIA (Philadelphia County, Pennsylvania)
Uchee Methodist Church (Russell County, Alabama)
Uchida Coffee Farm (Hawaii County, Hawaii)
Uebel House (Campbell County, Kentucky)
Uhlerstown Historic District (Bucks County, Pennsylvania)
Ulery Mill (Washington County, Pennsylvania)
Uline Ice Company Plant and Arena Complex (Washington, District of Columbia)
Ulmer, George, House (Waldo County, Maine)
Ulmer-Summers House (Calhoun County, South Carolina)
Ulrich Walser House (Buffalo County, Wisconsin)
Ulrickson Barn (Lincoln County, South Dakota)
Ulster and Delaware Railroad Station (Greene County, New York)
Ulster Heights Synagogue (Ulster County, New York)
Ulster House Hotel (Ulster County, New York)
Ulysses G. Orendorff House (Fulton County, Illinois)
Ulysses S. Grant Boyhood Home (Brown County, Ohio)
Ulysses S. Mace House (Craven County, North Carolina)
Umatilla Masonic Lodge Hall (Umatilla County, Oregon)
Umphress--Taylor House (Grayson County, Texas)
Umsted Farm (Seneca County, Ohio)
Una Consolidated School (Clay County, Mississippi)
Uncas School (Jefferson County, Washington)
Uncle Dave Macon House (Rutherford County, Tennessee)
Underground Atlanta Historic District (Fulton County, Georgia)
Underhill, George, House (Nassau County, New York)
Underwood Hotel (Bonneville County, Idaho)
Underwood United Methodist Church (Aurora County, South Dakota)
Underwood, Joesph H., House (Kennebec County, Maine)
Underwood-Jones House (Warren County, Kentucky)
Underwriters Salvage Corps (Hamilton County, Ohio)
Undine Apartments (Douglas County, Nebraska)
Undulata (Shelby County, Kentucky)
Union Auto Company (Eau Claire County, Wisconsin)
20th Century Commercial Architecture, Building used in auto business until 1977
Union Banking Company Building (Coffee County, Georgia)
Union Baptist Cemetery (Hamilton County, Ohio)
Union Baptist Church (Bristol County, Massachusetts)
Union Baptist Church (Hartford County, Connecticut)
Union Battery F, Battle of Corinth (Alcorn County, Mississippi)
Union Bethel A.M.E. Church (Orleans Parish, Louisiana)
Union Block (Berrien County, Michigan)
Union Block (Henry County, Iowa)
Union Block (Allen County, Ohio)
Union Block (Androscoggin County, Maine)
Union Block (Yamhill County, Oregon)
Union Block (Jefferson County, Kansas)
Union Block (Box Elder County, Utah)
Union Block (Livingston County, New York)
Union Block (Bourbon County, Kansas)
Union Block (Washtenaw County, Michigan)
Union Block (Traill County, North Dakota)
Union Brewery (Johnson County, Iowa)
Union Bridge Station (Carroll County, Maryland)
Union Bryarly's Mill (Berkeley County, West Virginia)
Union Bus Station (Madison County, Kentucky)
Union Canal Tunnel (Lebanon County, Pennsylvania)
Union Cemetery Gardener's Cottage (Hardin County, Iowa)
Union Central School (Gibson County, Tennessee)
Union Chapel (Greene County, New York)