All - Constructed - 1920–1929
| 12 Mile road-Kalamazoo River Bridge |
| 1616 Building |
| 1900 Rittenhouse Square Apartments |
| 4 Lazy F Dude Ranch |
| Abbe, Robert, Museum of Stone Antiquities |
| ABC Auto Sales and Investment Company Building |
| Abilene Union Pacific Railroad Freight Depot |
| Abilene Union Pacific Railroad Passenger Depot |
| Abraham Lincoln High School |
| Abramson House |
| Academy of Richmond County-1926 Campus |
| Ace Art Company |
| Acton High School |
| Adair County Courthouse |
| Adams, Carl G., House |
| Adams Woodframe Grain Elevator |
| Adath Israel Temple |
| A. D. German Wholesale Company and Warehouse, Additional Documentation |
| Aerial Lift Bridge |
| Aetna Hose, Hook and Ladder Company Fire Station No. 2 |
| Afro-American Sons and Daughters Hospital |
| Agecroft |
| Agriculture Building |
| Ahavas Sholem Synagogue |
| Ahavas Sholom |
| Ahwahnee Hotel |
| Ainsley, John Colpitts, House No. 3 |
| Air Service, Inc. Hangar at Bellanca Airfield |
| Aitkin County Courthouse and Jail |
| A.J. MEERWALD (Schooner) |
| Akron Jewish Center |
| Akron Post Office and Federal Building |
| Aladdin Theater |
| Alamance County Courthouse, |
| Alamance Hotel |
| Alameda High School |
| Alameda Veterans' Memorial Building |
| Alango School |
| Albert and Liberal Arts Halls |
| Alcazar Hotel |
| Alden Park Manor |
| Alderman House |
| Aldridge Hotel |
| Alexander Theatre |
| Alfalfa County Courthouse |
| Alger, Amanda K., Memorial Methodist Episcopal Church |
| Allegheny River Locka and Dam No. 5 |
| Allegheny River Lock and Dam No. 4 |
| Allen Memorial Medical Library |
| Allentown Bridge |
| Allentown Masonic Temple |
| Allerdice, Taylor, High School |
| Allis State Park |
| Allouez Pump House |
| Al Malaikah Temple |
| Aloha Tower |
| Alpha Phi Sorority House |
| Alpine County Courthouse |
| Ambassador Apartments |
| Ambassador Apartments |
| Ambassador Hotel |
| Ambassador Theater Building |
| American Baptist Theological Seminary Historic District |
| American Legion Cabin |
| American Legion Hall |
| American National Bank Building |
| American National Bank Building |
| American Radiator Building |
| American Railway Express Company Garage |
| American Telephone and Telegraph Company Building |
| Americus Hotel |
| Andalucia Building |
| Andalusia |
| Anderson Building, The |
| Anderson-Carlson Building |
| Anderson, Neil P., Building |
| Andridge Apartments |
| Angelus Mesa Branch |
| Animal Science Building |
| Annala Round Barn |
| Anoka-Champlin Mississippi River Bridge |
| Anshei Glen Wild Synagogue |
| Antelope Creek Covered Bridge |
| Antelope Grocery |
| Antelope School |
| Antioch Dependent School District #15 |
| Antlers Hotel |
| Apartments at 22-24 Collier Road |
| Apartments at 2 Collier Road |
| Apperson-Iowa Motor Car Company Building |
| Appleby Building |
| Aqudas Achim Synagogue |
| Aquila Court Building |
| Aquitania, The |
| Aquone |
| Arcada Theater Building |
| Arcade Building |
| Arcade Building |
| Arcade Hotel |
| Architects and Engineers Building |
Data from United States Park Service and Wikidata
