Sudler's Conclusion (Somerset County, Maryland)
Sudley (Anne Arundel County, Maryland)
Sudley Place (Robertson County, Tennessee)
Sue Shelby Mason House (Garrard County, Kentucky)
Suffolk Manor Apartments (Philadelphia County, Pennsylvania)
Suffolk Resolves House (Norfolk County, Massachusetts)
Sugar Grove (Bourbon County, Kentucky)
Sugg House (Tuolumne County, California)
Sulgrave Club (Washington, District of Columbia)
Sullivan House (Laurens County, South Carolina)
Sullivan House (Washington Parish, Louisiana)
Sullivan Roadhouse (Southeast Fairbanks Census Area, Alaska)
Sullivan Rooming House (Big Horn County, Montana)
Sullivan, Edward, House (Middlesex County, Massachusetts)
Sullivan, Roger, House (Hillsborough County, New Hampshire)
Sullivan--Hillyer House (Floyd County, Georgia)
Sullivan-Hogan House (Silver Bow County, Montana)
Sullivan-Kinney House (Bannock County, Idaho)
Sully (Fairfax County, Virginia)
Sumers Lodge (Garfield County, Colorado)
Summer Hill (Anne Arundel County, Maryland)
Summer Trees (Marshall County, Mississippi)
Summer Villa and the McKay-Salmon House (Harnett County, North Carolina)
Summers House (Kanawha County, West Virginia)
Summers Plantation (Lee County, Alabama)
Summers-Longley House-Building (St. Joseph County, Indiana)
Summerseat (Bucks County, Pennsylvania)
Summit (Baltimore County, Maryland)
Summit Creek Ranger Station (Routt County, Colorado)
Summit Lake Ranger Station (Shasta County, California)
Summit Lodge (Lewis and Clark County, Montana)
Summit Plantation House (Charleston County, South Carolina)
Sumner Moon House (Eau Claire County, Wisconsin)
Georgian Revival House with a commanding view of a hill now serving as apartments
Sumner, Charles, House (Suffolk County, Massachusetts)
Sumner, David, House (Windsor County, Vermont)
Sumner, George, House (Worcester County, Massachusetts)
Sumner--Carpenter House (Windham County, Connecticut)
Sumrall-Albritton House (Clarke County, Mississippi)
Sun Bright (Walton County, Florida)
Sun House (Mendocino County, California)
Sun Terrace (Litchfield County, Connecticut)
Sun-Up Ranch (Maricopa County, Arizona)
Sundelius House (Flathead County, Montana)
Sunny Meade (Jefferson Davis Parish, Louisiana)
Sunny Side (Alamance County, North Carolina)
Sunny Slope (Lee County, Alabama)
Sunnybrook (St. Tammany Parish, Louisiana)
Sunnycroft (York County, Maine)
Sunnyfields (Anne Arundel County, Maryland)
Sunnyfields (Albemarle County, Virginia)
Sunnyhill Home (Milwaukee County, Wisconsin)
A historically significant house that has both NRHP and National Landmark Status.
Sunnyside (Wake County, North Carolina)
Sunnyside (Rockbridge County, Virginia)
Sunnyside (Charlottesville, Virginia)
Sunnyside (Westchester County, New York)
Sunnyside (Davidson County, Tennessee)
Sunnyside (Greenwood County, South Carolina)
Gothic Revival home in Greenwood, SC
Sunnyside (Southampton County, Virginia)
Sunnyside (Jefferson County, Kentucky)
Sunnyside (Charleston County, South Carolina)
Sunnyside (Prince George's County, Maryland)
Sunnyside (Otsego County, New York)
Sunnyside (Northumberland County, Virginia)
Sunnyside Farm House (Jessamine County, Kentucky)
Sunnyslope (Amite County, Mississippi)
Sunnyslope (Bronx County, New York)
Sunnyslope Lodge (San Diego County, California)
Sunrise (Kanawha County, West Virginia)
Sunrise (Frederick County, Virginia)
Sunset Hill (Monroe County, West Virginia)
Sunset Hill (Herkimer County, New York)
Sunset Point (Vilas County, Wisconsin)
Superintendent's Cottage (Genesee County, Michigan)
Superintendent's House (Baker County, Oregon)
Superintendent's House (Granite County, Montana)
Superintendent's House (Edmonson County, Kentucky)
Superintendent's Residence (Coconino County, Arizona)
Superintendent's Residence (Yavapai County, Arizona)
Superintendent's Residence (Santa Fe County, New Mexico)
Supervisor's House No. 1001 (Grant County, Oregon)
Surface House (Montgomery County, Virginia)
Surratt House (Prince George's County, Maryland)
Susan B. Anthony Childhood House (Washington County, New York)
Susan B. Anthony House (Monroe County, New York)
Susan J. Armistead Moore House (Chowan County, North Carolina)
Susan Kirk Residence (Gallatin County, Montana)
Susan Sturges House (Richland County, Ohio)
Susan Wissler House (Sheridan County, Wyoming)
Susie Foster Log House (De Kalb County, Tennessee)
Susina Plantation (Grady County, Georgia)
Suter House (Harrison County, Mississippi)
Sutfield House (Mercer County, Kentucky)
Sutfield-Thompson House (Mercer County, Kentucky)
Sutherland, Daniel, House (Orange County, New York)
Sutherland, David, House (Orange County, New York)
Sutherlin Cabin (Benton County, Arkansas)
Sutter-Meyer House (St. Louis County, Missouri)
Suttner Mansion (Walla Walla County, Washington)
Neo-Classical style mansion built in 1910
Sutton House (New Castle County, Delaware)
Sutton House (Brown County, Ohio)
Sutton Place (Lenawee County, Michigan)
Sutton--Chapman--Howland House (Tioga County, New York)
Sutton-Ditz House (Clarion County, Pennsylvania)
Sutton-Newby House (Perquimans County, North Carolina)
Suydam House (Suffolk County, New York)
Swadkins, Thomas, House (Middlesex County, Massachusetts)
Swaim House (Marshall County, Tennessee)
Swain-Harrison House (New Haven County, Connecticut)
Swalwell Cottage (Snohomish County, Washington)
Swamp--Meadow Cabin West (Skagit County, Washington)
Swan House (Fulton County, Georgia)
Swan House and Vita Spring Pavilion (Dodge County, Wisconsin)
Swan Pond (Berkeley County, West Virginia)
Swan Ponds (Burke County, North Carolina)
Swan Turnblad House (Hennepin County, Minnesota)
Swan, Asie, House (Essex County, Massachusetts)
Swan, Edward H., House (Nassau County, New York)
Swan, Henry, House (Middlesex County, Massachusetts)
Swann-Daingerfield House (Alexandria, Virginia)
Swannanoa (Unspecified county, Virginia)
Swansbury (Harford County, Maryland)
Swanson House (Union County, South Dakota)
Swanton House (DeKalb County, Georgia)
Swanwyck (New Castle County, Delaware)
Swart House and Tavern (Schenectady County, New York)
Swart--Wilcox House (Otsego County, New York)
Swasey, James, House (Middlesex County, Massachusetts)
Swatara Ferry House (Dauphin County, Pennsylvania)
Swatara Furnace (Schuylkill County, Pennsylvania)
Swearingen House (De Soto Parish, Louisiana)
Sweeney-Royston House (Galveston County, Texas)
Sweet Briar House (Amherst County, Virginia)
Sweet Gum Stable (Floyd County, Indiana)
Sweet House (Sonoma County, California)
Sweet, Albert, House (Bristol County, Massachusetts)
Sweetland Farmhouse (Madison County, New York)
Sweetland, Sophia, House (Hartford County, Connecticut)
Sweetser Residence (Los Angeles County, California)
Sweetser, Daniel, House (Middlesex County, Massachusetts)
Sweetser, Michael, House (Middlesex County, Massachusetts)
Sweetser, Warren, House (Middlesex County, Massachusetts)
Swetland Homestead (Luzerne County, Pennsylvania)
Swetland House (Madison County, Ohio)
Swetland-Pease House (Hampden County, Massachusetts)
Swetman House (Kenai Peninsula Borough, Alaska)
Swett Ranch (Daggett County, Utah)
Swift House (Cook County, Illinois)
Swift, D. Wheeler, House (Worcester County, Massachusetts)
Swift-Coles House (Baldwin County, Alabama)
Swift-Kinsman House (Trumbull County, Ohio)
Swindall Tourist Inn (Maricopa County, Arizona)
Swindler House (Shelby County, Kentucky)
Switzer House (Flathead County, Montana)
Queen Anne style house built in 1910
Swope-Dudderar House and Mill Site (Lincoln County, Kentucky)
Sword Gate Houses (Charleston County, South Carolina)
Sycamore Cottage (Dorchester County, Maryland)
Sycamore Dale (Hampshire County, West Virginia)
Sycamore Landing (Humphreys County, Tennessee)
Sycamore Valley (Granville County, North Carolina)
Sydenham House (Essex County, New Jersey)
Sydney Barron House (Upson County, Georgia)
Sydney Kent House (Cook County, Illinois)
Sykes House (Berkshire County, Massachusetts)
Sykes-Leigh House (Lowndes County, Mississippi)
Sylvan Retreat (Bienville Parish, Louisiana)
Sylvania (McCormick County, South Carolina)
Sylvanus Johnson House (Johnson County, Iowa)
Sylvanus Mulford House (Susquehanna County, Pennsylvania)
Sylvest House (Washington Parish, Louisiana)
Sylvester H. Reeves House (Beaver County, Utah)
Sylvester House (San Francisco County, California)
Sylvester M. Mallette Cabin (Taos County, New Mexico)
Sylvester Millard House (Lake County, Illinois)
Sylvester Mumford House (Brantley County, Georgia)
Sylvester Opdyke House (Shiawassee County, Michigan)
Sylvester Shaw Residence (Summit County, Ohio)
Symmes, Deacon John, House (Middlesex County, Massachusetts)
Symmes, Marshall, House (Middlesex County, Massachusetts)
Symmes, Marshall, Tenant House (Middlesex County, Massachusetts)
Symmes, Stephen, Jr., House (Middlesex County, Massachusetts)
Symonds, Thomas, House (Middlesex County, Massachusetts)
Symons House (Lowndes County, Mississippi)
Symphony House (Penobscot County, Maine)
Synope Plantation House (Caldwell Parish, Louisiana)
T E Ranch Headquarters (Park County, Wyoming)
T. A. Hasler House (Bastrop County, Texas)
T. A. Livesley House (Marion County, Oregon)
T. B. Downing House (Santa Clara County, California)
T. B. Perry House (Monroe County, Iowa)
T. B. Ripy House (Anderson County, Kentucky)
T. Ben Loetscher House (Dubuque County, Iowa)
Privately owned/occupied home, not open to the public
T. Byron Story Mansion (Gallatin County, Montana)
T. C. Mahaffey House (Jefferson Davis Parish, Louisiana)
T. C. McRae House (Nevada County, Arkansas)
T. C. Smith House (Walworth County, Wisconsin)
T. C. Taliaferro House (Hillsborough County, Florida)