Built during 1790s

Southwest Point (Roane County, Tennessee)
Southwick--Daniels Farm (Worcester County, Massachusetts)
Sparta Historic District (Hancock County, Georgia)
Spaulding, Zachariah, Farm (Windsor County, Vermont)
Spink Farm (Washington County, Rhode Island)
Split Rock Furnace (Morris County, New Jersey)
Sprague, Gov. William, Mansion (Providence County, Rhode Island)
Spring Bank (Lunenburg County, Virginia)
Spring Hill Farm (Grafton County, New Hampshire)
Spring Mill Complex (Chester County, Pennsylvania)
Spring Mills Historic District (Berkeley County, West Virginia)
Spring Valley Farm (Monroe County, West Virginia)
Springer Farm (New Castle County, Delaware)
Springhill (Clark County, Kentucky)
Spurr, Eliphalet, House (Norfolk County, Massachusetts)
Spurr, John, House (Worcester County, Massachusetts)
Squire's Tavern (Litchfield County, Connecticut)
Operated as a tavern for part of its history, now home to the Barkhamsted Historical Society.
St. Ferdinand Central Historic District (St. Louis County, Missouri)
St. Francis Xavier Church (Cecil County, Maryland)
St. George's Chapel (Sussex County, Delaware)
St. George's Protestant Episcopal Church (St. Mary's County, Maryland)
St. Mark's Historic District (New York County, New York)
St. Thomas Episcopal Church (Hunterdon County, New Jersey)
St.-Marks-In-The-Bowery (New York County, New York)
Stagville (Durham County, North Carolina)
Stanardsville Historic District (Greene County, Virginia)
Stanley Tavern (Merrimack County, New Hampshire)
Statesview (Knox County, Tennessee)
Stephen Miller House (Columbia County, New York)
Sterling Homestead (Fairfield County, Connecticut)
Stewart--Hinton House (Petersburg, Virginia)
Stilwell Stone House (Ulster County, New York)
Stone House (Rockbridge County, Virginia)
Stone House on West Hickman (Jessamine County, Kentucky)
Stone Manse (Greenbrier County, West Virginia)
Stone--Darracott House (Cheshire County, New Hampshire)
Stone-Grant House (Scott County, Kentucky)
Stone-Tolan House (Monroe County, New York)
Stonehaven (Delaware County, Pennsylvania)
Stony Farm (Worcester County, Massachusetts)
Stony Point (Hawkins County, Tennessee)
Stony Point (Fayette County, Kentucky)
Stratton's Inn (Orange County, Vermont)
Strawberry Hill (Halifax County, North Carolina)
Strider Farm (Jefferson County, West Virginia)
Stroud Mansion (Monroe County, Pennsylvania)
Sudler's Conclusion (Somerset County, Maryland)
Sully (Fairfax County, Virginia)
Sunny Bank (Albemarle County, Virginia)
Sunnyside (Rockbridge County, Virginia)
Sunrise Mill (Montgomery County, Pennsylvania)
Sutton Farm (Chittenden County, Vermont)
Sutton House (New Castle County, Delaware)
Swetland Homestead (Luzerne County, Pennsylvania)
Swetland-Pease House (Hampden County, Massachusetts)
Swigart's Mill (York County, Pennsylvania)
Tabor Reformed Church (Lebanon County, Pennsylvania)
Taftsville Historic District (Windsor County, Vermont)
Talbot Hall (Norfolk, Virginia)
Taylor's Corner (Windham County, Connecticut)
Taylor-Whittle House (Norfolk, Virginia)
Tears, John, Inn (Orange County, New York)
Tellico Blockhouse Site (Monroe County, Tennessee)
Ten Broeck Mansion (Albany County, New York)
Tenney, Samuel, House (Rockingham County, New Hampshire)
Terhune-Hopper House (Bergen County, New Jersey)
Terhune-Ranlett House (Bergen County, New Jersey)
The Cabildo (Orleans Parish, Louisiana)
The Cedars (Wilkes County, Georgia)
The King Farm (Windsor County, Vermont)
The Presbytere (Orleans Parish, Louisiana)
The Wilbor House (Columbia County, New York)
Theodore Roosevelt Island National Memorial (Washington, District of Columbia)
Thetford Center Historic District (Orange County, Vermont)
Thomas Brodhead House (Columbia County, New York)
Thomas Davis House (Kent County, Delaware)
Thomas Gaddis Homestead (Fayette County, Pennsylvania)
Thomas House (Queen Anne's County, Maryland)
Thomas Jr. Ludlam House (Cape May County, New Jersey)
Thomas Law House (Washington, District of Columbia)
Thomas McLean House (Washington County, New York)
Thomas Murray House (Virginia Beach, Virginia)
Thomas Phillips Mill Complex (New Castle County, Delaware)
Thomas Scott House (Chester County, Pennsylvania)
Thompson's Mill-Amherst Mill Complex (Amherst County, Virginia)
Thorn Hill (Rockbridge County, Virginia)
Thorndale Farm (Frederick County, Virginia)
Thunderbird Lodge (Delaware County, Pennsylvania)
Tom Forman House (Mason County, Kentucky)
Townsend House (Chester County, Pennsylvania)
Traver, J. E., Farm (Dutchess County, New York)
Treber Inn (Adams County, Ohio)
Trinity Church (Grafton County, New Hampshire)
Tudor Hall (St. Mary's County, Maryland)
Tuttle House (Morris County, New Jersey)
Twin Houses (Currituck County, North Carolina)
Tyler Settlement Rural Historic District (Jefferson County, Kentucky)
Tyringham Shaker Settlement Historic District (Berkshire County, Massachusetts)
U.S.S. CONSTELLATION (Baltimore, Maryland)
U.S.S. CONSTITUTION (Suffolk County, Massachusetts)
Ulmer, George, House (Waldo County, Maine)
Umpawaug District School (Fairfield County, Connecticut)
Underhill, George, House (Nassau County, New York)
Union Meeting House, (Former) (Lincoln County, Maine)
Union Wharf (Suffolk County, Massachusetts)
United States Capitol Building (Washington, District of Columbia)
Upper Greenwich Friends Meetinghouse (Gloucester County, New Jersey)
Upriver Residential District (Adams County, Mississippi)
Vale, The (Middlesex County, Massachusetts)
Valley Lodge (Cumberland County, Maine)
Van Houten's Landing Historic District (Rockland County, New York)
Van Patten Barn Complex (Albany County, New York)
Van Valkenburgh--Isbister Farm (Columbia County, New York)
Van Wyck-Lefferts Tide Mill (Suffolk County, New York)
Vaughan Homestead (Kennebec County, Maine)
Vernon Center Green Historic District (Oneida County, New York)
Vesuvius Furnace (Lincoln County, North Carolina)
Vinson House (Cocke County, Tennessee)
Vital St. Gemme Beauvais House (Ste. Genevieve County, Missouri)
Wade House (Essex County, Massachusetts)
Waitsfield Common Historic District (Washington County, Vermont)
Walker-Ewing Log House (Allegheny County, Pennsylvania)
Walston-Bulluck House (Edgecombe County, North Carolina)
Ware Paper Mill (Middlesex County, Massachusetts)
Warner Martin House (Blount County, Tennessee)
Washington Historic District (Beaufort County, North Carolina)
Washington Street Historic District (Essex County, Massachusetts)
Washingtonian Hall (Broome County, New York)
Waterford Village Historic District (Saratoga County, New York)
Waterloo Historic District (Merrimack County, New Hampshire)
Waverly (Fauquier County, Virginia)
Weidner Rock House (Catawba County, North Carolina)
Welch-Nicholson House and Mill Site (Iredell County, North Carolina)
Welcome Hall (Woodford County, Kentucky)
West Cornerstone (Unspecified county, Virginia)
West Goshen Historic District (Litchfield County, Connecticut)
West Montgomery Avenue Historic District (Montgomery County, Maryland)
West School (Middlesex County, Massachusetts)
Western Fields (Wicomico County, Maryland)
Western View (Fluvanna County, Virginia)
Weston, Samuel, Homestead (Somerset County, Maine)
Weyanoke Plantation (Charles City County, Virginia)
Wharton Place (Accomack County, Virginia)
Wheat Row (Washington, District of Columbia)
White Bush (Berkeley County, West Virginia)
White Hall (Somerset County, Maryland)
White Horse Historic District (Chester County, Pennsylvania)
White House (Yadkin County, North Carolina)
White Oak Plantation (Mecklenburg County, North Carolina)
White, E. B., House (Hancock County, Maine)
White-Holman House (Wake County, North Carolina)
Whitehall (Madison County, Kentucky)
Whitford Hall (Chester County, Pennsylvania)
Whiting Homestead (Hartford County, Connecticut)
Whitney, Eli, Gun Factory (New Haven County, Connecticut)
Widow McDowell House (Bourbon County, Kentucky)
Wiggin, Kate Douglas, House (York County, Maine)
Willard--Fisk House (Worcester County, Massachusetts)
William Allen House (Elbert County, Georgia)
William and Agnes Gilkerson Farm (Caledonia County, Vermont)
William and Catherine Biggs Farm (Carroll County, Maryland)
William Blount Mansion (Knox County, Tennessee)
William Boggs Farm (Berkeley County, West Virginia)
William Campbell House (Scott County, Kentucky)
William Chapline House (Washington County, Maryland)
William G. Smith House (Granville County, North Carolina)
William Mackey House (Rockbridge County, Virginia)
William Maclay Mansion (Dauphin County, Pennsylvania)
Began as a gray limestone farmhouse owned by William McClay. Now a Georgian Revival housing the PBA.
William Rea Store (Hertford County, North Carolina)
William Sayers Homestead (Lee County, Virginia)
William Wilson House (Berkeley County, West Virginia)
Williamsville (Hanover County, Virginia)
Willoughby-Baylor House (Norfolk, Virginia)
Willows, The (Washington County, Maryland)
Windfall Dutch Barn (Montgomery County, New York)
Windmill Cottage (Kent County, Rhode Island)
Winslow, Luther, Jr., House (Bristol County, Massachusetts)
Woburn Street Historic District (Middlesex County, Massachusetts)
Wood, Ahijah, House (Worcester County, Massachusetts)
Woodbridge Farm (New London County, Connecticut)
Woodlawn Farm (Orange County, New York)
Woodlawn Plantation (Fairfax County, Virginia)
Woodruff, Jotham, House (Hartford County, Connecticut)
Wortendyke-Demund House (Bergen County, New Jersey)
Worthington Valley Historic District (Baltimore County, Maryland)
Wrightsville Historic District (York County, Pennsylvania)
Wytheville Historic District (Wythe County, Virginia)