Spruce Grove School (Chester County, Pennsylvania)
Spruce Hall (Larimer County, Colorado)
Spurgin Residence (Mahaska County, Iowa)
Square Schoolhouse (Rockingham County, New Hampshire)
SS Peter & Paul Catholic School (Boyd County, Nebraska)
St. Anastasia Catholic School, Old (St. Lucie County, Florida)
St. Andrew School (Bay County, Florida)
St. Anthony de Padua Parish School (Philadelphia County, Pennsylvania)
St. Anthony School (Broward County, Florida)
St. Augustine Hall (Wyandotte County, Kansas)
St. Augustine's College Campus (Wake County, North Carolina)
St. Basil's Academy (Iberville Parish, Louisiana)
St. Benedict's Catholic School (Musselshell County, Montana)
St. Catherine's School (Richmond, Virginia)
St. Cecilia Academy (Davidson County, Tennessee)
St. Cecilia School (Lafayette Parish, Louisiana)
St. Cecilia School Building (Jefferson County, Kentucky)
St. Christopher's Episcopal Mission (San Juan County, Utah)
St. Christopher's School (Richmond, Virginia)
St. Columba Catholic Campus (Jefferson County, Kentucky)
St. Columba School (Schenectady County, New York)
St. Elizabeth of Hungary (Baltimore, Maryland)
St. Euphemia's School and Sisters' House (Frederick County, Maryland)
St. Francis Mission (Todd County, South Dakota)
St. Francis Seminary (Hamilton County, Ohio)
St. George Elementary School (Washington County, Utah)
St. George's School and Convent (Hillsborough County, New Hampshire)
St. Gregory's Abbey and College (Pottawatomie County, Oklahoma)
St. Helena High School (Napa County, California)
St. Hyacinth School and Convent (Cumberland County, Maine)
St. Ignatius College (Cook County, Illinois)
St. Ignatius High School (Cuyahoga County, Ohio)
St. Johannes Danske Lutherske Kirke (Hamilton County, Nebraska)
St. John's Lutheran School (Shawnee County, Kansas)
St. John's Military Academy (Waukesha County, Wisconsin)
St. Joseph Convent and Academy (Logan County, Oklahoma)
St. Joseph Indian Normal School (Jasper County, Indiana)
St. Joseph School (St. Joseph County, Indiana)
St. Joseph's Academy (Ramsey County, Minnesota)
St. Joseph's Academy and Convent (Cumberland County, Maine)
St. Joseph's Basilica (Alameda County, California)
St. Joseph's Catholic Church (Latah County, Idaho)
St. Joseph's Convent and School (Middlesex County, Massachusetts)
St. Joseph's Industrial School (Kent County, Delaware)
St. Joseph's Mission (Yakima County, Washington)
St. Joseph's on the Brandywine (New Castle County, Delaware)
St. Joseph's School (York County, Maine)
St. Joseph's School (Berkshire County, Massachusetts)
St. Joseph's School (Ascension Parish, Louisiana)
St. Joseph's School (Middlesex County, Massachusetts)
St. Joseph's Seminary (Sullivan County, New York)
St. Lucie High School (St. Lucie County, Florida)
St. Mark United Presbyterian Church (Elbert County, Colorado)
St. Martinville Elementary School (St. Martin Parish, Louisiana)
St. Mary's Academy (Ramsey County, North Dakota)
St. Mary's Academy (Scott County, Iowa)
St. Mary's Academy (Warren County, New York)
St. Mary's Academy Historic District (Grant County, New Mexico)
St. Mary's Benefical Society Hall (Prince George's County, Maryland)
St. Mary's Catholic School (Lorain County, Ohio)
St. Mary's College (Wake County, North Carolina)
St. Mary's Complex (Bristol County, Massachusetts)
St. Mary's Girls Grade School (Erie County, Ohio)
St. Mary's Hall (Rice County, Minnesota)
St. Mary's Hall, University Of Dayton (Montgomery County, Ohio)
St. Mary's Infirmary (St. Louis, Missouri)
St. Mary's Institute of O'Fallon (St. Charles County, Missouri)
St. Mary's Parochial School (Hartford County, Connecticut)
St. Mary's School (Erie County, Ohio)
St. Mary's School (New Castle County, Delaware)
St. Mary's School (Brookings County, South Dakota)
St. Matthew High School (Natchitoches Parish, Louisiana)
St. Matthew's School (Ramsey County, Minnesota)
St. Matthews School (Wake County, North Carolina)
St. Michael School & Convent (Trego County, Kansas)
St. Michael's Mission (Fremont County, Wyoming)
St. Onge Schoolhouse (Lawrence County, South Dakota)
St. Patrick's Parish and Buildings (Hudson County, New Jersey)
St. Paul School Building (Madison County, Arkansas)
St. Paul's College (Brunswick County, Virginia)
St. Paul's School (Brunswick County, Virginia)
St. Peter Central School (Nicollet County, Minnesota)
St. Peter's Square (Allen County, Indiana)
St. Phillip School (Richland County, South Carolina)
St. Stanislaus Institute (Luzerne County, Pennsylvania)
St. Stanislaus Seminary (St. Louis County, Missouri)
St. Vincent de Paul School (Campbell County, Kentucky)
St. Vincent Orphanage and School Building (Santa Barbara County, California)
St. Vincent's College Building (Cape Girardeau County, Missouri)
St. Walburga's Academy (New York County, New York)
St.Bonifacius Kirche Complex (Jefferson County, Kentucky)
Stalnaker Hall (Monongalia County, West Virginia)
Stancioff House (Frederick County, Maryland)
Stanley Institute (Dorchester County, Maryland)
Stanley Patterson Hall (Dallas County, Texas)
Stanley School--Montclair School (Denver County, Colorado)
Stannard Schoolhouse (Caledonia County, Vermont)
Stanton Center (Anne Arundel County, Maryland)
Stanton Masonic Lodge and School (Haywood County, Tennessee)
Star Hall (Grand County, Utah)
Star School District 61 (Union County, South Dakota)
Stark School (Missoula County, Montana)
Starkey School (Roanoke County, Virginia)
Starkweather Religious Center (Washtenaw County, Michigan)
State Asylum for the Deaf,Dumb and Blind (Alameda County, California)
State Normal Training School (Hampden County, Massachusetts)
State Street Public School (Essex County, New Jersey)
Statenville Consolidated School (Echols County, Georgia)
Stearns School (Polk County, North Carolina)
Steele Hall (Shelby County, Tennessee)
Stehekin School (Chelan County, Washington)
Stephen F. Austin Elementary School (Tarrant County, Texas)
Stephen Foster Elementary School (Jefferson County, Kentucky)
Stephens College, South Campus (Boone County, Missouri)
Sterling District No. 5 Schoolhouse (Cayuga County, New York)
Sterrett Sub-District School (Allegheny County, Pennsylvania)
Sterry Hall (Canyon County, Idaho)
Stevens High School (Lancaster County, Pennsylvania)
Stevens Point State Normal School (Portage County, Wisconsin)
1894 Italian Renaissance Building
Stevens School (York County, Pennsylvania)
Stevenson Primary School (Lauderdale County, Mississippi)
Stewart Hall (Monongalia County, West Virginia)
Stewart Home School (Franklin County, Kentucky)
Stewart Indian School (Carson City, Nevada)
Stewart, A. T., Era Buildings (Nassau County, New York)
Stigler School Gymnasium--Auditorium (Haskell County, Oklahoma)
Stinson-Flake House (Navajo County, Arizona)
Stivers High School (Montgomery County, Ohio)
Stock Judging Pavilion (Brookings County, South Dakota)
Stock Pavilion (Dane County, Wisconsin)
Stockton Hall (Washington, District of Columbia)
Stone Academy (Johnson County, Iowa)
Stone Arabia School (Onondaga County, New York)
Stone Hall (Tompkins County, New York)
Stone Hall, Atlanta University (Fulton County, Georgia)
Stone School (Scott County, Iowa)
Stone School (Rockingham County, New Hampshire)
Stone School (Washtenaw County, Michigan)
Stone Schoolhouse (Sagadahoc County, Maine)
Stonefield (Charlottesville, Virginia)
Stonewall Jackson School (Richmond, Virginia)
Stoney Fork School (Buncombe County, North Carolina)
Stonington High School (New London County, Connecticut)
Stony Hill School (Ozaukee County, Wisconsin)
Stony Hill School (Hartford County, Connecticut)
Storey Gymnasium (Laramie County, Wyoming)
Story Grammar School (Essex County, Massachusetts)
Stoughton High School (Dane County, Wisconsin)
Stowe Teachers College (St. Louis, Missouri)
Strafford Union Academy (Strafford County, New Hampshire)
Strang School District No. 36 (Fillmore County, Nebraska)
Strassberger's Conservatory (St. Louis, Missouri)
Stratford Junior High School (Arlington County, Virginia)
Stratford School (Grant County, Washington)
Strawberry School (Gila County, Arizona)
Street Manual Training School (Dallas County, Alabama)
Strong Hall (Douglas County, Kansas)
Strong Hall houses the Administration and other university support services.
Stroud Grade School (Lincoln County, Oklahoma)
Stroud School, Old (Lincoln County, Oklahoma)
Sts. Peter and Paul Academy (Wayne County, Michigan)
Students' Hall (New York County, New York)
Studio Building (Alameda County, California)
Sturgis High School (Meade County, South Dakota)
Sturtevant Hall (Oxford County, Maine)
Stuyvesant Hall (Delaware County, Ohio)
Sudbury School No. 3 (Rutland County, Vermont)
Sue Bennett Memorial School Building (Laurel County, Kentucky)
Sue McBeth Cabin (Idaho County, Idaho)
Sugarloaf School (Jerome County, Idaho)
Summer Public School (Cooper County, Missouri)
Summerfield School (Le Flore County, Oklahoma)
Summerton High School (Clarendon County, South Carolina)
Summit Hill High School (Carbon County, Pennsylvania)
Summit School (King County, Washington)
Sumner High School (Bremer County, Iowa)
Sumner High School (Worth County, Georgia)
Sumner High School and Athletic Field (Wyandotte County, Kansas)