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Spring Valley Farm (Monroe County, West Virginia)
Springer Farm (Fayette County, Pennsylvania)
Springton Manor Farm (Chester County, Pennsylvania)
Sprowl's Covered Bridge (Washington County, Pennsylvania)
Covered bridge over Rocky Run on TR 450
Spurgeon House (Davidson County, North Carolina)
St. Albans General Store (Franklin County, Missouri)
St. Augustine's Catholic Church (Henry County, Ohio)
St. Benedict's Church (Doniphan County, Kansas)
St. Bridget Church (Marshall County, Kansas)
St. Euphemia's School and Sisters' House (Frederick County, Maryland)
St. Helena Historic Commercial District (Napa County, California)
St. James Episcopal Church (Dickson County, Tennessee)
St. John's Episcopal Church (Cumberland County, North Carolina)
St. John's Episcopal Church (Jefferson County, New York)
St. John's Episcopal Church (McDowell County, North Carolina)
St. John's Episcopal Church (Roanoke, Virginia)
St. John's Lutheran Church (Newberry County, South Carolina)
Historic church in rural Newberry County, SC
St. John's Lutheran Church and School (Dearborn County, Indiana)
St. John's Missionary Baptist Church (Craven County, North Carolina)
St. Joseph Church (Lawrence County, Tennessee)
St. Joseph Convent and Academy (Logan County, Oklahoma)
St. Landry Lumber Company (St. Landry Parish, Louisiana)
St. Luke's Episcopal Church (Summit County, Utah)
St. Mark's Church (Sumter County, South Carolina)
St. Mary's Assumption Church (Avoyelles Parish, Louisiana)
St. Mary's Covered Bridge (Huntingdon County, Pennsylvania)
St. Patrick's Catholic Church (Baldwin County, Alabama)
St. Paul AME Zion Church (Washington County, Tennessee)
St. Paul Church Historic District (Hamilton County, Ohio)
St. Peter's AME Zion Church (Craven County, North Carolina)
St. Peter's Episcopal Church (Westmoreland County, Virginia)
St. Peter's Episcopal Church (Lafayette County, Mississippi)
St. Peters Village Historic District (Chester County, Pennsylvania)
St. Philip's Moravian Church (Forsyth County, North Carolina)
St. Philips Episcopal Church (Mercer County, Kentucky)
St. Rose Roman Catholic Church Complex (Washington County, Kentucky)
St. Thomas Episcopal Church (New Castle County, Delaware)
St. Vincent of Paul Catholic Church (Jefferson County, New York)
Stack Barn (Benton County, Arkansas)
Stagg House (Alamance County, North Carolina)
Stahly--Nissley--Kuhns Farm (Elkhart County, Indiana)
Stallings-Carpenter House (Johnston County, North Carolina)
Stanley Potato House (Sussex County, Delaware)
State Bank Silverhill (Baldwin County, Alabama)
Staunton National Cemetery (Staunton, Virginia)
Stealey-Goff-Vance House (Harrison County, West Virginia)
Steamer Company Number 5 (Richmond, Virginia)
Steedman--Ray House (Washington, District of Columbia)
Steele Creek Roadhouse (Southeast Fairbanks Census Area, Alaska)
Steele Homestead (Sublette County, Wyoming)
Stein Mill (Berks County, Pennsylvania)
Stella Blacksmith Shop (Cowlitz County, Washington)
Stephen B. Quillen House (Russell County, Virginia)
Stephen Klein House (Comal County, Texas)
Stevens-Dorn Farmstead (Saluda County, South Carolina)
Historic home near Saluda, SC
Stevenson House (Tangipahoa Parish, Louisiana)
Steward--Emery House (Somerset County, Maine)
Stewart Stores (Bulloch County, Georgia)
Stewart-Studebaker House (Wells County, Indiana)
Stockgrowers Bank (Carbon County, Wyoming)
Stockton Community Building (Cedar County, Missouri)
Stockton Hall (Washington, District of Columbia)
Stoker House (Sabine Parish, Louisiana)
Stone Barn (Clayton County, Iowa)
Stone Barn Farm (Hancock County, Maine)
Stonefield (Charlottesville, Virginia)
Storehouse No. 4 (Prince of Wales-Hyder Census Area, Alaska)
Stouchsburg Historic District (Berks County, Pennsylvania)
Stratton's Independence Mine and Mill (Teller County, Colorado)
Strawberry Hill (Petersburg, Virginia)
Street Manual Training School (Dallas County, Alabama)
Streibich Blacksmith Shop (Douglas County, Illinois)
Strickland-Sawyer House (Ellis County, Texas)
Strode's Mill (Chester County, Pennsylvania)
Stuart Hotel (Hughes County, Oklahoma)
Stuart House (Victoria County, Texas)
Stupp--Oxenrider Farm (Berks County, Pennsylvania)
Sugg House (Tuolumne County, California)
Summerville Historic District (Dorchester County, South Carolina)
Sun-Up Ranch (Maricopa County, Arizona)
Sunny Side (Alamance County, North Carolina)
Sunny Side Inn (Martin County, North Carolina)
Sunnybank (Madison County, North Carolina)
Sunnyside (Rockbridge County, Virginia)
Sunnyside Farm (Loudoun County, Virginia)
Surface Creek Livestock Company Silos (Delta County, Colorado)
Sutton House (Brown County, Ohio)
Swaggerty Blockhouse (Cocke County, Tennessee)
Sycamore Dale (Hampshire County, West Virginia)
Sycamore Landing (Humphreys County, Tennessee)
Sylvester Smith Farmstead (Izard County, Arkansas)
T. G. Henderson House (Columbia County, Florida)
T. H. B. Dawson House (Morgan County, West Virginia)
T. M. Ferguson House (Searcy County, Arkansas)
T. R. R. Cobb House (Clarke County, Georgia)
T.G. Richards and Company Store (Whatcom County, Washington)
Takoma Park Historic District (Washington, District of Columbia)
Tankersley Tavern (Rockbridge County, Virginia)
Taylor Hill Hotel (Johnson County, Arkansas)
Taylor Springs (Rockingham County, Virginia)
Taylor's Mill (Nash County, North Carolina)
Taylorstown Historic District (Washington County, Pennsylvania)
Ted Smallwood Store (Collier County, Florida)
Telephone Exchange Building (New London County, Connecticut)
Temora (Howard County, Maryland)
Temple Beth-El (Navarro County, Texas)
Tensas Parish Courthouse (Tensas Parish, Louisiana)
Terrell-Sadler House (Putnam County, Georgia)
Tet Woods Building (Adams County, Ohio)
Tezcuco (Ascension Parish, Louisiana)
Thankful Baptist Church (Washington County, Tennessee)
Thayer--Thompson House (Erie County, Pennsylvania)
The Berkeley Apartments (Douglas County, Nebraska)
The Buckingham (Marion County, Indiana)
The Campground (Mobile County, Alabama)
The Cedars (Albemarle County, Virginia)
The Hermitage (Jefferson County, West Virginia)
The Waverly (Henderson County, North Carolina)
Thiede Ranch (Jefferson County, Colorado)
Third National Bank (Barren County, Kentucky)
Thirteen Oaks (Sampson County, North Carolina)
Thomas A. Crews House (Forsyth County, North Carolina)
Thomas and Company Cannery (Montgomery County, Maryland)
Thomas and Melinda Benton House (Harrison County, Mississippi)
Thomas B. Finley Law Office (Wilkes County, North Carolina)
Thomas C. Fletcher House (Jefferson County, Missouri)
Thomas Carroll House (Cabell County, West Virginia)
Thomas Drugs (Robertson County, Tennessee)
Thomas F. Dilworth House (Alcorn County, Mississippi)
Thomas F. Lloyd Historic District (Orange County, North Carolina)
Thomas Hope House (Santa Barbara County, California)
Thomas Jarvi Homestead (Valley County, Idaho)
Thomas Jerkins House (Craven County, North Carolina)
Thomas Law House (Washington, District of Columbia)
Thomas Lynch House (Searcy County, Arkansas)
Thomas M. Gilmer House (Wilkes County, Georgia)
Thomas McAdory House (Jefferson County, Alabama)
Thomas Point Shoals Light Station (Anne Arundel County, Maryland)
Thomas Williamson House (Rutherford County, Tennessee)
Thomasville Depot (Thomas County, Georgia)
Thomasville Railroad Passenger Depot (Davidson County, North Carolina)
Thompson House (Gloucester County, New Jersey)
Thornton Adobe Barn (Pratt County, Kansas)
Thorpe's Opera House (Butler County, Nebraska)
Tichnor Rice Dryer and Storage Building (Arkansas County, Arkansas)
Tilson Farm (Unicoi County, Tennessee)
Titus W. Carr House (Greene County, North Carolina)
Tobasco Mine and Mill (Unspecified county, Colorado)
Tobe Wiley House (Johnson County, Kentucky)
Todd Historic District (Ashe County, North Carolina)
Town of Crested Butte (Gunnison County, Colorado)
Tracy's Landing Tobacco House No. 2 (Anne Arundel County, Maryland)
Tremont House (Huron County, Ohio)
Trianon Historic District (Lenoir County, North Carolina)
Trinity Church (Howard County, Maryland)
Trinity Church (Hanover County, Virginia)
Trinity Episcopal Church (Surry County, North Carolina)
Trinity United Methodist Church (Montgomery County, Virginia)
Trop Farm (Highland County, Ohio)
Trudeau House (West Feliciana Parish, Louisiana)
True Reformer Building (Washington, District of Columbia)
Tucker's Grove Camp Meeting Ground (Lincoln County, North Carolina)
Tudor Hall (Harford County, Maryland)
Tularosa Original Townsite District (Otero County, New Mexico)
Tule Springs Ranch (Clark County, Nevada)
Tull-Worth-Holland Farm (Lenoir County, North Carolina)
Turcotte House (Rankin County, Mississippi)
Turkey Creek Community Historic District (Harrison County, Mississippi)
Turner House (Madison County, Kentucky)
Turney--Hutchins House (Trousdale County, Tennessee)
Tuscarora Creek Historic District (Berkeley County, West Virginia)
Twain, Mark, House (Hartford County, Connecticut)
Twin Beach AME Church (Baldwin County, Alabama)
Twin Creek Ranch (Teller County, Colorado)
Tyro Tavern (Davidson County, North Carolina)
U.S. Customshouse (St. Lawrence County, New York)
U.S. Post Office (Venango County, Pennsylvania)
U.S. Post Office (Thurston County, Washington)
U.S. Post Office (Cumberland County, North Carolina)
Uchee Methodist Church (Russell County, Alabama)
Union Bryarly's Mill (Berkeley County, West Virginia)
Union City Commercial Historic District (Randolph County, Indiana)
Union Historic District (Monroe County, West Virginia)
Union Hotel (Cumberland County, Pennsylvania)