Built during 1910s

10th Street Market (Alameda County, California)
12th Avenue South Bridge (King County, Washington)
Steel arch bridge over WA 90 (Dearborn Street) on 12th Avenue S in Seattle
1722-1724 Main Street (Richland County, South Carolina)
1911 Kinney County Courthouse (Kinney County, Texas)
1915 Taylor County Courthouse (Taylor County, Texas)
1916 Buffalo High School (Cass County, North Dakota)
1918 Standard Oil Filling Station (Ogle County, Illinois)
217-219 N. Second Street (Buchanan County, Missouri)
This two story red brick building is located at 217-219 N. Second Street.
301 N. Third Street (Buchanan County, Missouri)
This seven story red brick building is located at 301 N. Third Street.
303 Saluda Avenue (Richland County, South Carolina)
32nd St. and Lancaster Ave. Philadelphia Armory (Philadelphia County, Pennsylvania)
369th Regiment Armory (New York County, New York)
69th Street Transfer Bridge (New York County, New York)
Part of Riverside Park
9th Avenue Station (Dual System BRT) (Kings County, New York)
A. A. Hurst House (Jackson County, Iowa)
A. B. Baca House (Socorro County, New Mexico)
A. B. C. Dodd House (Floyd County, Iowa)
A. B. Enos Building (Hughes County, Oklahoma)
A. C. Foster Building (Denver County, Colorado)
A. D. German Warehouse (Richland County, Wisconsin)
The only Frank Lloyd Wright building in his hometown of Richland Center and a highly endangered landmark.
A. E. C. Cottage No. 23 (Anchorage, Alaska)
A. E. Doyle Cottage (Tillamook County, Oregon)
A. G. Newman House (Lincoln County, Idaho)
A. G. Wilson House (Collin County, Texas)
A. H. Maegly House (Multnomah County, Oregon)
A. H. Sweet Residence and Adjacent Small House (San Diego County, California)
A. J. Mason Building (Wagoner County, Oklahoma)
A. L. Kenyon House (Eau Claire County, Wisconsin)
A. M. Rothschild & Company Store (Cook County, Illinois)
A. S. Cleveland House (Harris County, Texas)
A. S. Noon Building (Santa Cruz County, Arizona)
A. T. Lewis New Building (Denver County, Colorado)
A. W. Sillure House (Williamson County, Texas)
A.B. Hunter Home (New Madrid County, Missouri)
Mansion built by A.B. Hunter, Sr.
A.B.C. Storage and Van Company Building (Jackson County, Missouri)
A.J. Boss House (Walton County, Georgia)
A.J. Eicholtz House (Brown County, Kansas)
A.L. Palmer Building (King County, Washington)
A.L. Wynkoop House (Doniphan County, Kansas)
A.M. Lamb House (Hillsborough County, Florida)
A.P. Dickman House (Hillsborough County, Florida)
A.P. Woodson and Leigh Yawkey Woodson House (Marathon County, Wisconsin)
Prairie School of Design mansion built in 1914, now serving the Marathon County Historical Society
Aaron Drumright Building (Creek County, Oklahoma)
Abandoned Lime Cement Factory (Baker County, Oregon)
Former abandoned cement factory of I-84
Abdou Building (El Paso County, Texas)
Abell house (St. Mary's County, Maryland)
Abercrombie--Cavanaugh House (Angelina County, Texas)
Aberdeen City Hall (Monroe County, Mississippi)
Abner Ellsworth House (Navajo County, Arizona)
Abraham and Phoebe Ball House (Lane County, Oregon)
Abraham Tichner House (Multnomah County, Oregon)
Absaroka Mountain Lodge (Park County, Wyoming)
Acacia Lodge (Santa Barbara County, California)
Achille Duquesne House (Twin Falls County, Idaho)
Acme Theater (Wayne County, North Carolina)
Acre Family Barn (Blaine County, Oklahoma)
Adams Block (Gallatin County, Montana)
Adams County Courthouse (Adams County, Wisconsin)
Adams County Courthouse (Adams County, Idaho)
Adams School (Maricopa County, Arizona)
Adams School (Umatilla County, Oregon)
Two story brick schoolhouse built in 1918
Adamson Bridge (Cherry County, Nebraska)
Adath Jeshurun Temple and School (Jefferson County, Kentucky)
Adele Ilfeld Auditorium (San Miguel County, New Mexico)
Adler House (Independence County, Arkansas)
Administration Building (Otero County, New Mexico)
Administration Building (Travis County, Texas)
Administration Building, Atascadero Colony (San Luis Obispo County, California)
Adolph C. Ochs House (Brown County, Minnesota)
Adolph Meyer School (Orleans Parish, Louisiana)
Adolph Schreiber House (Ada County, Idaho)
Adoniram Masonic Lodge (Granville County, North Carolina)
Adrian Pierson House (Pinal County, Arizona)
ADVENTURESS (King County, Washington)
Advertising Building (St. Louis, Missouri)
Agate Theater (Hennepin County, Minnesota)
Age-Herald Building (Jefferson County, Alabama)
Agen Warehouse (King County, Washington)
Agricultural Chemistry Building (Dane County, Wisconsin)
Member of the Henry Mall Historic District
Aguayo Family Homestead (Lincoln County, New Mexico)
Agudas Achim Anshei Sfard Synagogue (Middlesex County, Massachusetts)
Aigler Alumni Building (Seneca County, Ohio)
Ainsworth House (Sanders County, Montana)
Airtight Bridge (Coles County, Illinois)
Through truss bridge over Embarras River on TR 275, northeast of Charleston, 3 mi. northwest of Ashmore
Aitken Barn (Idaho County, Idaho)
Aitkin Carnegie Library (Aitkin County, Minnesota)
Aitkin County Courthouse and Jail (Aitkin County, Minnesota)
Al. Ringling Theatre (Sauk County, Wisconsin)
Likely the first "movie palace" designed by Rapp & Rapp
Alabama Penny Savings Bank (Jefferson County, Alabama)
Alameda Apartments (Muskingum County, Ohio)
Alameda Theater (Stanly County, North Carolina)
Alamo Methodist Church (Bexar County, Texas)
Alaska Governor's Mansion (Juneau Borough, Alaska)
Alaska Native Brotherhood Hall (Sitka Borough, Alaska)
Alaskan Hotel (Juneau Borough, Alaska)
Albany County Supreme Court (Albany County, New York)
Albert E. Sleeper House (Huron County, Michigan)
Albert Heintz Oscar, and Linda, House (Multnomah County, Oregon)
Albert Nelson Farmstead (Kittitas County, Washington)
Albert S. Brandeis Elementary School (Jefferson County, Kentucky)
Alberta Teachers House (Stevens County, Minnesota)
Alberton School (Mineral County, Montana)
Albertus L. Meyers Bridge (Lehigh County, Pennsylvania)
Open-spandrel arch bridge over Little Lehigh Creek on PA 2055 (8th Street) in Allentown
Albion Flats (Vanderburgh County, Indiana)
Albion State Bank (Pushmataha County, Oklahoma)
Alcazar Hotel, New (Coahoma County, Mississippi)
Alcoa Edgewater Works (Bergen County, New Jersey)
Alden Public Library (Hardin County, Iowa)
Alderman's 20 Stores in One (Clarendon County, South Carolina)
Alderson Bridge (Unspecified county, West Virginia)
Alderson Bridge (Greenbrier County, West Virginia)
Aldo Leopold Neighborhood Historic District (Bernalillo County, New Mexico)
Aldred, John E., Estate (Nassau County, New York)
Aldridge H. Vann House (Franklin County, North Carolina)
Alex Halone House (Hot Springs County, Wyoming)
Alex Williams House (Hinds County, Mississippi)
Alexander Crummell School (Washington, District of Columbia)
Alexander D. McDougall House (Multnomah County, Oregon)
Alexander H. McMicken House (Milwaukee County, Wisconsin)
One of the best preserved Craftsman style homes in West Allis.
Alexander Hotel (Pinellas County, Florida)
Alexander K. McClure School (Philadelphia County, Pennsylvania)
Alexander P. Anderson Estate--Tower View (Goodhue County, Minnesota)
Alexander Stephens Skelton House (Hart County, Georgia)
Alf Griesenbeck House (Bastrop County, Texas)
Alfred and Clara Sevareid House (McHenry County, North Dakota)
Alfred and Magdalena Schmid Farmstead (Richardson County, Nebraska)
Alfred Dawson House (Linn County, Oregon)
Alfred E. Dickey Free Library (Stutsman County, North Dakota)
Alfred H. and Mary E. Smith House (Multnomah County, Oregon)
Alfred M. Glossbrenner Mansion (Marion County, Indiana)
Alfred T. Ringling Manor (Morris County, New Jersey)
Alfred W. Greer House (Butler County, Missouri)
Algeria Shrine Temple (Lewis and Clark County, Montana)
Alhambra Theater (Franklin County, Ohio)
Alhambra Theater (Shelby County, Indiana)
Former theater, now a retail establishment specializing in formal wear
Alhambra Theatorium (Vanderburgh County, Indiana)
Alice Beck Cabin (Flathead County, Montana)
Alice Henderson Strong House (Multnomah County, Oregon)
Alice Paul Birthplace (Burlington County, New Jersey)
Aliceville Elementary and High School (Pickens County, Alabama)
Alki Point Lighthouse (King County, Washington)
37 foot tall lighthouse and fog signal building erected in 1913
Alkrama Theater (Pasquotank County, North Carolina)
Alku & Alku Toinen (Kings County, New York)
All Saints Catholic Church (Guthrie County, Iowa)
All Saints Church of Eben Ezer (Morgan County, Colorado)
All Saints' Episcopal Church, Waccamaw (Georgetown County, South Carolina)
All Soul's Chapel (Androscoggin County, Maine)
All Souls Congregational Church (Penobscot County, Maine)
Allan Herschell 3-Abreast Carousel (Santa Barbara County, California)
Allan Herschell Carousel Factory (Niagara County, New York)
Allan Miller House (Cook County, Illinois)
Allas Apartments (Douglas County, Nebraska)
Allbach House (Harris County, Texas)
Allen Chapel AME Church (Tarrant County, Texas)
Allen Hotel (Berkshire County, Massachusetts)
Allen Parish Courthouse (Allen Parish, Louisiana)
Allen--White School (Hardeman County, Tennessee)
Alliance Bank Building (Stark County, Ohio)
Allison Mansion (Marion County, Indiana)
Allison Ranger Station (Harney County, Oregon)
Alma Carnegie Library (Harlan County, Nebraska)
Almira Hotel (Lincoln County, Washington)
Almot Schlenker House (Washington County, Texas)
Aloah Hotel (Henderson County, North Carolina)
Aloha Hive Camp (Orange County, Vermont)
Alpena Light (Alpena County, Michigan)
Alpha Xi Delta Sorority Chapter House (Champaign County, Illinois)
Alpine Apartments (Deer Lodge County, Montana)
Alta Mesa Farm Bureau Hall (Sacramento County, California)
Alta Public Library (Cuyahoga County, Ohio)
Altawood Historic District (Jefferson County, Kentucky)
Altman House (Phillips County, Arkansas)
Alton Simmons House (Onondaga County, New York)
Alumni Hall (Allegheny County, Pennsylvania)
Alva Consolidated Schools (Lee County, Florida)
Alva Kitselman House (Delaware County, Indiana)
Alvah N. Belding Memorial Library (Ionia County, Michigan)
Alvarado Theater (Los Angeles County, California)
Alvin Eskelton Barn (Lincoln County, Idaho)
Ambassador Apartments (Hartford County, Connecticut)
Amboy United Brethren Church (Clark County, Washington)