Louisiana - Area of significance: Architecture
| 1309 Harmony Street |
| 1937 Iowa High School |
| 1939 St. Bernard Parish Courthouse |
| Abbeville Commercial Historic District |
| Abbeville Residential Historic District |
| Abita Springs Historic District |
| Abita Springs Pavilion |
| Academy of the Sacred Heart |
| Acadia Plantation |
| Agudath Achim Anshe Sfard Synagogue |
| Aillet House |
| Alabama Methodist Church |
| A La Bonne Veillee |
| Albania Plantation House |
| Aldrich-Genella House |
| Alesia |
| Alexandria Garden District |
| Alexandria Hall-Louisiana College |
| Alexandria Post-War Suburbs Historic District |
| Alexandria Public Library, Old |
| Algiers Point |
| Alice |
| Alice C Planation House |
| Allen-Barringer House |
| Allen House |
| Allen Parish Courthouse |
| All Saints Episcopal Church |
| American Chicle Company Building |
| Angelus |
| Antioch Baptist Church |
| Antonia |
| Arceneaux, Louis J. and Marie Amelia, House |
| Arcola Presbyterian Church |
| Ardoyne Plantation House |
| Argyle |
| Arizona Methodist Church |
| Arlington Plantation |
| Arlington Plantation House |
| Arlington Plantation House |
| Armitage |
| Ashland |
| Asphodel Plantation and Cemetery |
| Assumption Parish Courthouse and Jail |
| Atkinson Memorial Presbyterian Church |
| Audubon Plantation House |
| Austerlitz |
| Autrey House |
| Avondale Plantation Home |
| Babington, Robert H., House |
| Bacas House |
| Badin-Roque House |
| Bagatelle Plantation House |
| Bailey Theatre |
| Baker High School Auditorium |
| Baker Presbyterian Church |
| Bank of Grand Cane |
| Bank of Gueydan |
| Bank of Lafourche Building |
| Bank of Lockport |
| Bank of Louisiana |
| Bank of Minden |
| Bank of Ville Platte |
| Bank of Webster |
| Barksdale Field Historic District |
| Barret Elementary School |
| Barthel Pigeonnier |
| Bastrop High School |
| Baton Rouge High School |
| Baton Rouge Junior High School |
| Baton Rouge Savings and Loan Association |
| Battleground Plantation |
| Bayou Rouge Baptist Church |
| Bayouside |
| Bayside |
| Bay Tree |
| Bazoon, William Lee and Eudora Courtney, Farmstead |
| Beauregard Parish Courthouse |
| Beauregard Parish Jail |
| Beauregard Town Historic District |
| Belisle Building |
| Belle Alliance |
| Bennett Plantation House |
| Bentley Hotel |
| Bergeron, Jean Baptiste, House |
| Bergeron, Valmont, House |
| Bertus-Ducatel House |
| Billeaud House |
| Billeaud, Martial, Jr., House |
| Birg House |
| Bittersweet |
| Bland House |
| Blanks House |
| Block, J. S., Building |
| Bloom's Arcade |
| Blue Plate Building |
| Blythewood |
| B'Nai Zion Temple |
| Boatner House |
| Bocage |
| Bogalusa City Hall |
Data from United States Park Service and Wikidata
