Built during 1830s

St. John's Episcopal Church (Franklin County, Vermont)
St. Louis Air Force Station (St. Louis, Missouri)
St. Luke's Episcopal Church (Warren County, New Jersey)
St. Luke's Episcopal Church (Berkshire County, Massachusetts)
St. Luke's Episcopal Church (Licking County, Ohio)
St. Marks Lighthouse (Wakulla County, Florida)
St. Mary's Falls Canal (Chippewa County, Michigan)
St. Mary's of the Mountain Church (Greene County, New York)
St. Mary's Roman Catholic Church (Charleston County, South Carolina)
St. Michael's Church Historic District (St. James Parish, Louisiana)
St. Michael's Roman Catholic Church (Passaic County, New Jersey)
St. Milachi Church (Chester County, Pennsylvania)
St. Patrick's Church (Orleans Parish, Louisiana)
St. Paul's Episcopal Church (Windsor County, Vermont)
St. Paul's Episcopal Church (Williamson County, Tennessee)
St. Paul's Episcopal Church and Rectory (Westchester County, New York)
St. Paul's Evangelical Lutheran Church (Albany County, New York)
St. Paul's Lutheran Church (Greene County, New York)
St. Peter's Church (Richmond, Virginia)
St. Peter's Episcopal Church and Rectory (Indiana County, Pennsylvania)
St. Peter's Roman Catholic Church (Jefferson County, West Virginia)
St. Peter's Roman Catholic Church (New York County, New York)
St. Philip's Episcopal Church (Charleston County, South Carolina)
St. Thomas Chapel (Frederick County, Virginia)
St. Thomas Church (Orange County, Virginia)
Stagecoach Inn (Addison County, Vermont)
Stahl--Hoagland House (Stark County, Ohio)
Staple Bend Tunnel (Cambria County, Pennsylvania)
Staples, Sylvanus N., House (Bristol County, Massachusetts)
Starksboro Village Meeting House (Addison County, Vermont)
Starr Clark Tin Shop (Oswego County, New York)
State Arsenal (Providence County, Rhode Island)
State Bank (Gallatin County, Illinois)
State Bank Building, Decatur Branch (Morgan County, Alabama)
A historic Jeffersonian-style bank building in Decatur, Alabama.
State Bank of Indiana (Branch of) (Vigo County, Indiana)
19th Century Greek Revival office building, oldest commercial structure in Terre Haute
State Bank of Tennessee (Maury County, Tennessee)
Steamboat Hotel (Erie County, Ohio)
Stephen Byrd House (Cape Girardeau County, Missouri)
Stewart Cobblestone Farmhouse (Monroe County, New York)
Still River Baptist Church (Worcester County, Massachusetts)
Stillman's Run Battle Site (Ogle County, Illinois)
Site of the initial battle of the Blackhawk War
Stites House (Hamilton County, Ohio)
Stockridge Indian Cemetery (Calumet County, Wisconsin)
Historical cemetery located just outside Stockbridge, WIsconsin
Stockton Street Historic District (Mercer County, New Jersey)
Stone Bridge (Hartford County, Connecticut)
Stone arch bridge over CT 598 (Whitehead Highway) on Main Street in Hartford
Stone Building (Middlesex County, Massachusetts)
Stone Farmhouse (Erie County, New York)
Stone Grist Mill Complex (Montgomery County, New York)
Stone House (Cumberland County, Maine)
Stone House on Kentucky River (Carroll County, Kentucky)
Stone Mills Union Church (Jefferson County, New York)
Stone Mountain Historic District (DeKalb County, Georgia)
Stone Post Office (Jackson County, Michigan)
Stone Shop, Old (Jefferson County, New York)
Stone Village Historic District (Windsor County, Vermont)
Stone's Trace (Noble County, Indiana)
Stonebraker and Harbaugh--Shafer Building (Frederick County, Maryland)
Stonehall (Calhoun County, Michigan)
Stonewall (Nash County, North Carolina)
Stover Mill (Bucks County, Pennsylvania)
Stow--Hasbrouck House (Calhoun County, Michigan)
Strafford Union Academy (Strafford County, New Hampshire)
Straightsmouth Island Light (Essex County, Massachusetts)
Strasburg Rail Road (Lancaster County, Pennsylvania)
Heritage railroad located near Strasburg, Pennsylvania
Strauder Goff House (Clark County, Kentucky)
Stringer Stone House (Jefferson County, Ohio)
Stringtown House (Davis County, Iowa)
Sturgeon House (Erie County, Pennsylvania)
Stuyvesant Square Historic District (New York County, New York)
Sullivan House (Laurens County, South Carolina)
Summers Plantation (Lee County, Alabama)
Sunnyfields (Albemarle County, Virginia)
Sunnyside (Mecklenburg County, Virginia)
Sunnyside (Westchester County, New York)
Sunnyside Farm House (Jessamine County, Kentucky)
Supreme Court Library Building (Greenbrier County, West Virginia)
Susan B. Anthony Childhood House (Washington County, New York)
Sussex County Courthouse and the Circle (Sussex County, Delaware)
Sutter's Fort (Sacramento County, California)
Sutton--Chapman--Howland House (Tioga County, New York)
Swatara Furnace (Schuylkill County, Pennsylvania)
Sweet Gum Stable (Floyd County, Indiana)
Swindler House (Shelby County, Kentucky)
Sycamore Dale (Hampshire County, West Virginia)
Sydney Barron House (Upson County, Georgia)
Sykes-Leigh House (Lowndes County, Mississippi)
Sylvester Shaw Residence (Summit County, Ohio)
Symons House (Lowndes County, Mississippi)
Symphony House (Penobscot County, Maine)
Tack Factory, The (Plymouth County, Massachusetts)
Taftsville Covered Bridge (Windsor County, Vermont)
Covered bridge over Ottauquechee River on River Road (C2002) in Woodstock
Tall Pines (Madison County, New York)
Tallmadge-Mithoff House (Fairfield County, Ohio)
Tankersley Tavern (Rockbridge County, Virginia)
Taunton Green Historic District (Bristol County, Massachusetts)
Taylorsville Canal Inn (Montgomery County, Ohio)
Teel--Crawford--Gaston Plantation (Sumter County, Georgia)
Tefft--Steadman House (Onondaga County, New York)
Terry-Hayden House (Hartford County, Connecticut)
Probably demolished
Terwilliger--Smith Farm (Ulster County, New York)
Tessier Buildings (East Baton Rouge Parish, Louisiana)
Tevis Cottage (Shelby County, Kentucky)
Thayer Farmstead (Oswego County, New York)
The Anchorage (Albemarle County, Virginia)
The Cedars (Hertford County, North Carolina)
The Kouns-Womack House (Greenup County, Kentucky)
Victorian Greek Revival Style Home
The Lyceum (Alexandria, Virginia)
The Tavern (Barbour County, Alabama)
Designed by Edward Williams and built in 1836.
The Texas (Baldwin County, Alabama)
Theresa Dam Site (Washington County, Wisconsin)
Parkland on former site of Lake Theresa
Third Creek Presbyterian Church and Cemetery (Rowan County, North Carolina)
Thirty-Fifth Parallel Route (Apache County, Arizona)
Thomas H. Palmer House (Rutland County, Vermont)
Thomas Holland House (Lawrence County, Alabama)
Thomas House (Shelby County, Kentucky)
Thomas Johnson House (Coshocton County, Ohio)
Thomas Jr. Woodard Farm (Robertson County, Tennessee)
Thomas Lyne House (Woodford County, Kentucky)
Thomas Marble Quarry Houses (Chester County, Pennsylvania)
Thomas Miller House (Hamilton County, Ohio)
Thomas T. Wright House (Switzerland County, Indiana)
Thomas Viaduct, Baltimore & Ohio Railroad (Unspecified county, Maryland)
Eight-span stone arch bridge over Patapsco River on the B&O Railroad between Relay and Elkridge
Thomas W. Laundon House (Lorain County, Ohio)
Thomas--Webster Estate (Plymouth County, Massachusetts)
Thompson, Abijah, House (Middlesex County, Massachusetts)
Thornburgh House (Jefferson County, Kentucky)
Thorndale (Granville County, North Carolina)
Thornhill (Greene County, Alabama)
A historic plantation near Forkland, Alabama.
Thornhill (Talladega County, Alabama)
Thresher Mill (Caledonia County, Vermont)
Thunder Bay Island Light Station (Alpena County, Michigan)
Tidwell--Amis--Haynes House (Coweta County, Georgia)
Tiffany--Leonard House (Worcester County, Massachusetts)
Tiger--Anderson House (Sangamon County, Illinois)
Tillman House (Adams County, Mississippi)
Tisdale-Morse House (Bristol County, Massachusetts)
Titusville Historic District (Mercer County, New Jersey)
Todd County Courthouse (Todd County, Kentucky)
Todd-Montgomery Houses (Boyle County, Kentucky)
Tom Salter House (Garrard County, Kentucky)
Tom Smith House (Washington County, Arkansas)
Tomkins-Swartz Mill (Floyd County, Indiana)
One of a few commercial buildings left in Galena, Indiana
Tomlinson Mansion (Wood County, West Virginia)
Toombs Tobacco Farm (Charlotte County, Virginia)
Torreya State Park (Liberty County, Florida)
Town Farms Inn (Middlesex County, Connecticut)
Townsend, Henry, House (Suffolk County, New York)
Tracewell House (Wood County, West Virginia)
Traip, Robert and Louisa, House (York County, Maine)
Treadwell--Sparks House (Middlesex County, Massachusetts)
Treat, Nathaniel, House (Penobscot County, Maine)
Trevino--Uribe Rancho (Zapata County, Texas)
Trinity Church (Oswego County, New York)
Trinity Episcopal Church (St. Lawrence County, New York)
Trinity Episcopal Church (Franklin County, Florida)
Trinity Episcopal Church (Boyle County, Kentucky)
Trinity Episcopal Church Complex (Ulster County, New York)
Tripp House and Store Complex (Greene County, New York)
Trowbridge Square Historic District (New Haven County, Connecticut)
Trudeau House (West Feliciana Parish, Louisiana)
Tulane University of Louisiana (Orleans Parish, Louisiana)
Tuleyries, The (Clarke County, Virginia)
Tullie Smith House (Fulton County, Georgia)
Tupper-Barnett House (Wilkes County, Georgia)
Turkey Point Light Station (Cecil County, Maryland)
Turley Mill and Distillery Site (Taos County, New Mexico)
Turn Store and the Tinsmith's Shop (Pike County, Pennsylvania)
Turner Town House (Androscoggin County, Maine)
Twin Arch Stone Culvert (Miami County, Ohio)
U.S. Arsenal Building (Pulaski County, Arkansas)
U.S. Arsenal--Officers Quarters (Gadsden County, Florida)
U.S. Customhouse (Bristol County, Massachusetts)
U.S. Department of the Treasury (Washington, District of Columbia)
U.S. Mint, New Orleans Branch (Orleans Parish, Louisiana)
U.S. Post Office (Bradley County, Tennessee)
Ulery Mill (Washington County, Pennsylvania)
Umsted Farm (Seneca County, Ohio)
Underwood, Joesph H., House (Kennebec County, Maine)
Union Bryarly's Mill (Berkeley County, West Virginia)
Union Chapel (Howard County, Maryland)
Union Church (Androscoggin County, Maine)
Union Church (Oxford County, Maine)
Union Church (Franklin County, Maine)
Union Street Historic District (Schenectady County, New York)
Uniontown Historic District (Perry County, Alabama)
A historic district in Uniontown, Alabama.
Unitarian Church (Rockingham County, New Hampshire)
Unitarian Society, The (Bristol County, Massachusetts)
Unitarian Universalist Church (Cortland County, New York)
United Methodist Church (Hamilton County, Ohio)
United Methodist Church (St. Lawrence County, New York)
Unity Town Hall (Sullivan County, New Hampshire)