Riverview School (Spencer County, Kentucky)
Robert Cleveland Log House (Wilkes County, North Carolina)
Robert Steen House (Chester County, Pennsylvania)
Robert Worthington House (Jefferson County, West Virginia)
Roberts H. Jernigan House (Hertford County, North Carolina)
Roberts-Carter House (Gates County, North Carolina)
Robinson Mill (Loudon County, Tennessee)
Rochelle School (Alachua County, Florida)
Rocheport (Boone County, Missouri)
Rochester Downtown Historic District (Fulton County, Indiana)
Rock Hill Farm (Franklin County, Pennsylvania)
Rock Ledge (Sullivan County, Tennessee)
Rock Mill (Manitowoc County, Wisconsin)
Rock Spring (Jefferson County, West Virginia)
Rock Springs Camp Meeting Ground (Lincoln County, North Carolina)
Rockland (Baltimore County, Maryland)
Rockwood (New Castle County, Delaware)
Rocky Mount Mills (Nash County, North Carolina)
Rocky Mount Mills Village Historic District (Nash County, North Carolina)
Roddy Road Covered Bridge (Frederick County, Maryland)
Rodney Center Historic District (Jefferson County, Mississippi)
Roesler House (Austin County, Texas)
Roger Dickson Farm (Duplin County, North Carolina)
Roger Hunt Mill (Chester County, Pennsylvania)
Rogers Building (Orange County, Florida)
Rogers, Nathaniel, House (Suffolk County, New York)
Rogers--Bell House (Travis County, Texas)
Rohrbaugh Cabin (Grant County, West Virginia)
Rokeby (King George County, Virginia)
Roller-Pettyjohn Mill (Sullivan County, Tennessee)
Romberger-Stover House (Dauphin County, Pennsylvania)
Rome House (Ascension Parish, Louisiana)
Rose Cliff (Waynesboro, Virginia)
Rose Cottage/Peyton House (Charlottesville, Virginia)
Rose Hill (Franklin County, North Carolina)
Rose Hill (Seneca County, New York)
Rose Hill (Jefferson County, Kentucky)
Rose Hill Farm (Jefferson County, West Virginia)
Rose Hill Farm (Frederick County, Virginia)
Rosedale Historic District (Jefferson County, Alabama)
Rosedale Plantation Barn (Clark County, Arkansas)
Rosemary Hall (Aiken County, South Carolina)
Ross Row Houses (Shawnee County, Kansas)
Rossonian Hotel (Denver County, Colorado)
Round Barn (Paulding County, Ohio)
Round Rock Commercial Historic District (Williamson County, Texas)
Round Valley Flour Mills (Mendocino County, California)
Rowlett House (Trimble County, Kentucky)
Roxbury (Westmoreland County, Virginia)
Royall Cotton Mill Commissary (Wake County, North Carolina)
Royalton Mill Complex (Windsor County, Vermont)
Rudolf Kunze Barn (Twin Falls County, Idaho)
Rue Chapel AME Church (Craven County, North Carolina)
Russell House (Bedford County, Pennsylvania)
Russell House (Oconee County, South Carolina)
Ryerss Mansion (Philadelphia County, Pennsylvania)
S. B. Brodbeck Housing (York County, Pennsylvania)
Saathoff House (Medina County, Texas)
Sabine Pass Lighthouse (Cameron Parish, Louisiana)
Safford House (Pinellas County, Florida)
Saint Anthony's Catholic Church (Logan County, Arkansas)
Saint Stephen's Episcopal Church (Bedford County, Virginia)
Salem Church (Monroe County, Ohio)
Salem College Administration Building (Harrison County, West Virginia)
Salem School (Charlotte County, Virginia)
Salem Town House (Former) (Franklin County, Maine)
Salisbury Congregational Church (Addison County, Vermont)
Salubria Lodge No. 31 (Washington County, Idaho)
Sam Delph House (Boone County, Kentucky)
Sam S. Shubert Theatre (Hennepin County, Minnesota)
Samuel A. Patton Building (Blount County, Tennessee)
Samuel B. Stauber Farm (Forsyth County, North Carolina)
Samuel Bartley Holleman House (Wake County, North Carolina)
Samuel Burdsal House (Hamilton County, Ohio)
Samuel Cooper Farmhouse (Delaware County, Ohio)
Samuel Cox House (Ashe County, North Carolina)
Samuel D. Byrd Sr., Homestead (Grant County, Arkansas)
Samuel F. Dale House (Venango County, Pennsylvania)
Samuel G. Smith Farm (Wayne County, Indiana)
Samuel Hall House (Dane County, Wisconsin)
Samuel Henry Davis House (Franklin County, Ohio)
Samuel Lyle Log House (Highland County, Ohio)
Samuel Miller House (Lynchburg, Virginia)
Samuel Patterson House (Westmoreland County, Pennsylvania)
Samuel Stacker House (Stewart County, Tennessee)
Samuel Sweet Canal Store (Montgomery County, New York)
San Francisco Ranch (Zapata County, Texas)
San Ignacio Church (Bernalillo County, New Mexico)
San Jacinto County Courthouse (San Jacinto County, Texas)
San Juan Bautista Third Street Historic District (San Benito County, California)
Sanderson House (Jones County, North Carolina)
Sanford F. Conley House (Boone County, Missouri)
Sanford, Frederick S., House (Litchfield County, Connecticut)
Santa Fe Depot (Creek County, Oklahoma)
Sarah Jane Orgain House (Bastrop County, Texas)
Sardis Baptist Church (Bullock County, Alabama)
A historic church near Union Springs, Alabama.
Sargent Historic District (Coweta County, Georgia)
Savenac Nursery Historic District (Mineral County, Montana)
Sawhill Covered Bridge (Washington County, Pennsylvania)
Covered bridge over Buffalo Creek on TR 426
Sawyer-Curtis House (Washington County, Ohio)
Sawyers Crossing Covered Bridge (Cheshire County, New Hampshire)
Two-span covered bridge over Ashuelot River on Sawyers Crossing Road in Swanzey
Schexnayder House (Iberville Parish, Louisiana)
Schneider Triangle (Washington, District of Columbia)
Schoharie Valley Railroad Complex (Schoharie County, New York)
Schoolhouse (Burlington County, New Jersey)
Schuylkill Navigation Canal, Oakes Reach Section (Unspecified county, Pennsylvania)
Sciver Block Building (Rice County, Minnesota)
Scotland Hotel (Greene County, Indiana)
Scott and Wilson Houses District (Fayette County, Kentucky)
Scott Covered Bridge (Greene County, Pennsylvania)
Scott House (Williamsburg County, South Carolina)
Scott-Vrooman House (McLean County, Illinois)
Seaboard Air Line Passenger Depot (Richmond County, North Carolina)
Historic Hamet Depot gets a new lease on life
Seaboard Historic District (Northampton County, North Carolina)
Seashore Farmers' Lodge No. 767 (Charleston County, South Carolina)
Seaside Plantation (Beaufort County, South Carolina)
Secessionville Historic District (Charleston County, South Carolina)
Seneca Glass Company Building (Monongalia County, West Virginia)
Seto Building (Kauai County, Hawaii)
Seven Pines National Cemetery (Henrico County, Virginia)
Severance--Pipe Farmstead (Portage County, Wisconsin)
Shadrach Lambeth House (Davidson County, North Carolina)
Shannon Farm (Boulder County, Colorado)
Shannon--Williamson Ranch (Contra Costa County, California)
Shapira Hotel (Madison County, Texas)
Sharpe-Gentry Farm (Catawba County, North Carolina)
Shawsville Historic District (Montgomery County, Virginia)
Shearer Store (Madison County, Kentucky)
Sheehan House (Pendleton County, Kentucky)
Shelby-Nicholson-Schindler House (Perry County, Missouri)
Shell Gas Station (Stanislaus County, California)
Shelton--Lockeby House (Pike County, Arkansas)
Shenandoah Historic District (Page County, Virginia)
Shenandoah--Dives Mill (San Juan County, Colorado)
Shepard Street--South Road Street Historic District (Pasquotank County, North Carolina)
Shirley Opera House (Rawlins County, Kansas)
Shriver Covered Bridge (Greene County, Pennsylvania)
Shrock House (Attala County, Mississippi)
Shumaker-Lewis House (Mason County, West Virginia)
Shuping's Mill Complex (Rowan County, North Carolina)
Sierra Bonita Ranch (Unspecified county, Arizona)
Signal Hill (Culpeper County, Virginia)
Silas Ferrell House (Richland County, Ohio)
Silas J. Fenton House (Jefferson Davis Parish, Louisiana)
Simon Pickle Stone House (Centre County, Pennsylvania)
Sims--Brown House (Lowndes County, Mississippi)
Sixth Mount Zion Baptist Church (Richmond, Virginia)
Skeen's Mill Covered Bridge (Randolph County, North Carolina)
Skullyville County Jail (Le Flore County, Oklahoma)
Slate Covered Bridge (Cheshire County, New Hampshire)
Reconstructed covered bridge over Ashuelot River on Westport Village Road in Swanzey
Slaughter-Hill House (Culpeper County, Virginia)
Sleepy Hollow Farm (Loudoun County, Virginia)
Smelter Machine Shop (Yavapai County, Arizona)
Smith, Bradford, Building (Bristol County, Massachusetts)
Smith-Davis House (Warren County, Ohio)
Smith-Rourke House (Suffolk County, New York)
Smithfield Farm (Clarke County, Virginia)
Smyrna Methodist Church (White County, Arkansas)
Snake Creek Farm Historic District (Carroll County, Virginia)
Snow Hill (Bourbon County, Kentucky)
Snow Hill Normal and Industrial Institute (Wilcox County, Alabama)
A historic African American school in Snow Hill, Alabama.
Snowbound Mine (Boulder County, Colorado)
Sol Akins Farm (Bulloch County, Georgia)
South Bridge Street Historic District (Victoria County, Texas)
South Broadway Neighborhood District (Scott County, Kentucky)
South Cherry Street Historic District (Warren County, Mississippi)
South College Street Historic District (Rankin County, Mississippi)
South Franklin Street Historic District (Montgomery County, Virginia)
South Milford Historic District (Sussex County, Delaware)
South Pittsburg Historic District (Marion County, Tennessee)
South Race Street Historic District (Iredell County, North Carolina)
South Side German Historic District (Adams County, Illinois)
Southern Railway Passenger Depot (Orangeburg County, South Carolina)
Southwest Historic District (Roanoke, Virginia)
Spangler--Benner Farm (Adams County, Pennsylvania)
Spannuth Mill (Berks County, Pennsylvania)
Sparta Electric Building (White County, Tennessee)
Speight-Bynum House (Greene County, North Carolina)
Spencerville School Campus (Choctaw County, Oklahoma)
Sperry--Smith House (White County, Tennessee)
Spinks Plantation (Pike County, Mississippi)
Spring Hill (Thomas Lillard House) (Boyle County, Kentucky)
Spring Hill Farm (Loudoun County, Virginia)
Spring Hill Presbyterian Church (Maury County, Tennessee)
Spring Hope Historic District (Nash County, North Carolina)
Spring Mill Complex (Chester County, Pennsylvania)
Spring Place Historic District (Murray County, Georgia)
Spring Station (Jefferson County, Kentucky)