10th and Cass Streets Neighborhood Historic District (La Crosse County, Wisconsin)
Eclectic collection of 31 homes in La Crosse
1300 Grove Street House (Warren County, Mississippi)
18th and Vine Historic District (Jackson County, Missouri)
2000 Block Of Eye Street, NW (Washington, District of Columbia)
746 Buildings at 744 748, 750 Broadway (Albany County, New York)
75 Murray Street Building (New York County, New York)
A. B. Moss Building (Payette County, Idaho)
A. H. and Company Black Building (Coos County, Oregon)
A. J. Jernigan House (Travis County, Texas)
A. J. Miller House (Augusta County, Virginia)
A. Larson & Co. Building (Kandiyohi County, Minnesota)
A. Nanbu Hotel--Holy's Bakery (Hawaii County, Hawaii)
A. S. Rugge House (Warren County, New York)
A.C. Waltman House (Lewis County, Missouri)
A.D. (Boss) Jones House (Schenectady County, New York)
A.K. Wilson Building (Polk County, Oregon)
A.S. Allen Buildings (Barton County, Kansas)
Aaron A. Sargent House (Nevada County, California)
Aaron G. Cloud House (Hamilton County, Illinois)
Abbeville Commercial Historic District (Vermilion Parish, Louisiana)
Abell Farmhouse and Barn (Madison County, New York)
Aberdeen Downtown Historic District (Monroe County, Mississippi)
Aberdeen Historic District (Brown County, South Dakota)
Abilene Historic District #1 (Dickinson County, Kansas)
Abner C. Johnson House (Genesee County, Michigan)
Abner Davison House (Scott County, Iowa)
Aborn, John, House (Middlesex County, Massachusetts)
Abraham Briggs Bowen House (Winnebago County, Wisconsin)
Mid-nineteenth century Italianate mansion
Abraham Groesbeck House (Cook County, Illinois)
Abram Emery House (Muskingum County, Ohio)
Absalom Lowe Landis House (Bedford County, Tennessee)
Academy Grove Historic District (Somerset County, Maryland)
Academy Hall (Erie County, Pennsylvania)
Academy of the Sacred Heart (Wayne County, Michigan)
Acorn Hall (Morris County, New Jersey)
Acton House (Preble County, Ohio)
Adam and Mary Smith House (Dane County, Wisconsin)
Brick, Italianate style home built by a prominent citizen
Adams County Courthouse (Adams County, Pennsylvania)
Adams House (East Baton Rouge Parish, Louisiana)
Adams Odd Fellows Hall (Umatilla County, Oregon)
Adams School (Hancock County, Ohio)
Adams, John E., House (Providence County, Rhode Island)
Adams, John, School (Norfolk County, Massachusetts)
Adams, Seth, House (Middlesex County, Massachusetts)
Adolph Block (Marion County, Oregon)
Adolphus W. Brower House (De Kalb County, Illinois)
Adon Smith House (Madison County, New York)
Adrian Engine House No. 1 (Lenawee County, Michigan)
Aetna Station No. 5 (Fond du Lac County, Wisconsin)
Repurposed fire station now serving as a private office
AF and AM Lodge 687, Orangeville (Stephenson County, Illinois)
Ah Louis Store (San Luis Obispo County, California)
Ahern, Catherine, Three-Decker (Worcester County, Massachusetts)
Ahimaaz King House (Warren County, Ohio)
Aiken's Tavern Historic District (New Castle County, Delaware)
Airy Castle (Bourbon County, Kentucky)
Alabama Insane Hospital (Tuscaloosa County, Alabama)
Alabama's oldest and largest inpatient psychiatric facility.
Albania Plantation House (St. Mary Parish, Louisiana)
Albany Street Historic District (Madison County, New York)
Albert Field Tack Company (Bristol County, Massachusetts)
Albert H. Kelly House (Salt Lake County, Utah)
Albert Palmer House (Shiawassee County, Michigan)
Albion Historic District (Providence County, Rhode Island)
Albright House (Lee County, Iowa)
Alden Hatch Steele House (Thurston County, Washington)
Aldrich Building (Kent County, Michigan)
Alexander and Elizabeth Aull Graves House (Lafayette County, Missouri)
Alexander Briggs House (Coles County, Illinois)
Alexander Clark House (Muscatine County, Iowa)
Alexander Clemons House (Ottawa County, Ohio)
Alexander McClew Farm House (Genesee County, Michigan)
Alexander St. Clair House (Tazewell County, Virginia)
Alexander Woods House (Calhoun County, Alabama)
Alexandria National Cemetery (Alexandria, Virginia)
Alfonso McKibben House (Bracken County, Kentucky)
Alfred A. Robb House (Montgomery County, Tennessee)
Alfred Drowne Road Historic District (Bristol County, Rhode Island)
Alfred Hebard House (Montgomery County, Iowa)
Alfred Hirt House (Putnam County, Indiana)
Alfred Rowland House (Robeson County, North Carolina)
Algiers Point (Orleans Parish, Louisiana)
Alibi Club (Washington, District of Columbia)
Alice Brown House (Seminole County, Oklahoma)
Alkemeyer Commercial Buildings (Hamilton County, Ohio)
Allen House (Middlesex County, Massachusetts)
Allen House (Dubuque County, Iowa)
Allen House Hotel (Thurston County, Washington)
Allen Mercantile Company (Decatur County, Georgia)
Allen-Beville House (Queens County, New York)
Allen-Mangum House (Granville County, North Carolina)
Allentown Historic District (Erie County, New York)
Alma Thomas House (Washington, District of Columbia)
Almshouse (Middlesex County, Massachusetts)
Almshouse, The (Richmond, Virginia)
Aloys Bilz House (Ottawa County, Michigan)
Former residence now a counseling center
Alpha Charles Childs House (Lake County, Ohio)
Alvah A. Heald House (Polk County, Wisconsin)
Alverson--Copeland House (Livingston County, New York)
Alvord I. Smith House (Scott County, Iowa)
Amazeen House (Aroostook County, Maine)
Amboy Illinois Central Depot (Lee County, Illinois)
Ambrose Cory House (Seneca County, Ohio)
Ambrose Hopkinson House (Richland County, Illinois)
Amelia Bloomer House (Seneca County, New York)
American Mills Web Shop (New Haven County, Connecticut)
American Thermos Bottle Company Laurel Hill Plant (New London County, Connecticut)
American Tobacco Company Manufacturing Plant (Durham County, North Carolina)
Ammadelle (Lafayette County, Mississippi)
Ammendale Normal Institute (Prince George's County, Maryland)
Ammi and William Wright House (Saginaw County, Michigan)
Amos Catlin Spafford House (Winnebago County, Illinois)
Amos Kelly House (Crawford County, Pennsylvania)
Amos Shinkle Summer Residence (Kenton County, Kentucky)
Amsterdam Historic District (Hunterdon County, New Jersey)
Anacostia Historic District (Washington, District of Columbia)
Anadarko Downtown Historic District (Caddo County, Oklahoma)
Anderson Downtown Historic District (Madison County, Indiana)
Anderson, Ludwig, Three-Decker (Worcester County, Massachusetts)
Anderson--Coward House (Shelby County, Tennessee)
Anderson--Hobson Mercantile Store (Little River County, Arkansas)
Andrew and Jennie McFarlane House (Westmoreland County, Pennsylvania)
Andrew C. Vaughn House (Williamson County, Tennessee)
Andrew Dall Jr. and James, Houses (Cuyahoga County, Ohio)
Andrew F. Scott House (Wayne County, Indiana)
Andrew Frame House (Waukesha County, Wisconsin)
Andrew Nilsson House (Columbia County, Washington)
Andrew Powell Homestead (Hancock County, Ohio)
Andrew Thomas House (Carroll County, Indiana)
Andrew Wilcox House (Jackson County, Michigan)
Andrews, Joseph, House (Middlesex County, Massachusetts)
Andrews-Duncan House (Wake County, North Carolina)
Androscoggin Mill Block (Androscoggin County, Maine)
Angelo Marre House (Pulaski County, Arkansas)
Anger's Block (Winona County, Minnesota)
Ann Arbor Central Fire Station (Washtenaw County, Michigan)
Annandale Historic District (Hunterdon County, New Jersey)
Anniston Transfer Company (Calhoun County, Alabama)
Annobee Apartments (Pierce County, Washington)
Ansel T. Walling House (Pickaway County, Ohio)
Anson Warner Farmstead (Walworth County, Wisconsin)
Anthony Burdick House (Scott County, Iowa)
Anthony Hockman House (Harrisonburg, Virginia)
Anthony Pitzer Jr., House (Licking County, Ohio)
Anthony Reckless Estate (Monmouth County, New Jersey)
Anthracite Bank Building (Schuylkill County, Pennsylvania)
Anton Wulff House (Bexar County, Texas)
Antonio Maria Peralta House (Alameda County, California)
Arcade Hotel (Clark County, Ohio)
Arch and Ridge Streets Historic District (Marquette County, Michigan)
Archibald M. Kennedy House (Rush County, Indiana)
Archwood Avenue Historic District (Cuyahoga County, Ohio)
Argos Downtown Historic District (Marshall County, Indiana)
Arista Hoge House (Staunton, Virginia)
Arizona Daily Star Building (Pima County, Arizona)
Arlington (Madison County, Kentucky)
Arlington Hotel (Muskingum County, Ohio)
Armour & Co. Building (San Francisco County, California)
Armsmear (Hartford County, Connecticut)
Armstrong House (Berkshire County, Massachusetts)
Arnold--Harrell House (Rutherford County, Tennessee)
Aroostook County Courthouse and Jail (Aroostook County, Maine)
Art Gallery Building (St. Joseph County, Michigan)
Arthur Larkin House (Ellsworth County, Kansas)
Arthur R. Hoard House (Jefferson County, Wisconsin)
Arthur W. Wright House (Mower County, Minnesota)
Asa Wilson House (Davis County, Iowa)
Asahel Bush House (Marion County, Oregon)
Ash Street Historic District (Middlesex County, Massachusetts)
Ash Street School (Worcester County, Massachusetts)
Ashburnham Center Historic District (Worcester County, Massachusetts)
Ashby (Montgomery County, Indiana)
Ashe House (Hardin County, Kentucky)
Ashland (Fayette County, Kentucky)
Ashland (Prince George's County, Maryland)
Ashland Town House (Middlesex County, Massachusetts)
Ashley River Historic District (Unspecified county, South Carolina)
Ashtabula County Courthouse Group (Ashtabula County, Ohio)
Ashtabula Harbour Commercial District (Ashtabula County, Ohio)
Assembly of Exempt Firemen Building (Hudson County, New Jersey)
Assumption Parish Courthouse and Jail (Assumption Parish, Louisiana)
Aston Building (Collin County, Texas)
Astoria Downtown Historic District (Clatsop County, Oregon)
Asylum Avenue District (Hartford County, Connecticut)
Athenaeum of Philadelphia (Philadelphia County, Pennsylvania)
Athens Historic District (Fayette County, Kentucky)
Atlanta University Center District (Fulton County, Georgia)
Attleborough Falls Historic District (Bristol County, Massachusetts)
Atwood, Charles R., House (Bristol County, Massachusetts)
Aubertine Building (Jefferson County, New York)
Auburn Button Works and Logan Silk Mills (Cayuga County, New York)
Former industrial campus repurposed as residential space
Audenried Cottage (Monmouth County, New Jersey)
August Sommer House (Marion County, Indiana)