Missouri - Area of significance: Architecture
| 138th Infantry Missouri National Guard Armory |
| 1524 Grand Avenue Building |
| 1901 McGee Street Automotive Service Building |
| #1 Fairway |
| 5882 Cabanne Courtyard Apartment Building |
| A.B.C. Storage and Van Company Building |
| ABC Storage & Van Company Warehouse B |
| Abkemeyer, John, House |
| Abou Ben Adhem Shrine Mosque |
| Acme Brass and Machine Works Building |
| ACME Cleansing Company Building |
| Adair County Courthouse |
| Administration Building, Missouri State Fruit Experiment Station |
| Advertising Building |
| Affton High School |
| African Church |
| Agee Apartments Historic District |
| Aines Farm Dairy Building |
| Albany Carnegie Public Library |
| Alley Spring State Park Historic District |
| Alligator Oil Clothing Company Building |
| Alswel |
| Alton Club |
| Ambassador Apartments |
| Ambassador Hotel Historic District |
| Ambassador Theater Building |
| American Furnace Company |
| American Theater |
| American Zinc, Lead and Smelting Company Building |
| Anderson, Charles Isaac and Lizzie Hunter Moore, House |
| Anderson Electric Car Company Building |
| Anderson, Elijah Teague, House |
| Anderson House and Lexington Battlefield |
| Andrew County Courthouse |
| Andrews-Wing House |
| Anheuser-Busch Brewing Association Building |
| Antioch Christian Church |
| Apartments at 5561-71 Chamberlain |
| A & P Food Stores Building |
| Arcade Building |
| Archambault House |
| Archbishop O’Hara High School |
| Argyle Building |
| Arlington School |
| Armour Boulevard Post-World War II Apartment Building Historic District |
| Armour Theatre Building |
| Arrow Rock State Historic Site Bridge |
| Arrow Rock State Historic Site Grave Shelter |
| Arrow Rock State Historic Site Lookout Shelter |
| Arrow Rock State Historic Site Open Shelter |
| Arthur-Leonard Historic District |
| Assumption Greek Orthodox Church |
| Assumption of the Blessed Virgin Mary Parish Historic District |
| Atchison County Memorial Building |
| Atkins-Johnson Farmhouse Property |
| Atwood, John C. and Georgie, House |
| Aubert Place |
| Aubuchon, August, House |
| Aubuchon, Baptiste G., House |
| Audrain County Courthouse |
| Aurora Apartments |
| Autocar Sales and Service Building |
| Ava Ranger Station Historic District |
| Bacon, Charles, House |
| Baden School |
| Bailey Family Farm Historic District |
| Bailey School |
| Baity Hall |
| Baker, Sylvester Marion and Frances Anne Stephens, House |
| Baker-Vawter Building |
| Ball-Essen Farmstead Historic District |
| Bancroft School |
| Bank of St. Ann |
| Barclay Building |
| Barkley, Levi, House |
| Barnard, Capt. George and Attella, House |
| Barr Branch Library Historic District |
| Barrett, Randolph Columbus, House |
| Barteau House |
| Bartelmann, Henry, House |
| Barton House |
| Bartsch-Jasper House |
| Bassett, Dr. Samuel A., Office and Residence |
| Bates County Courthouse |
| Bates-Geers House |
| Bayles Addition Historic District |
| Bayley, Romanzo N., House |
| Bear Creek Baptist Church |
| Beaumont Medical Building |
| Beckett, William S. and Mary, House |
| Bedford, Edwin and Nora Payne, House |
| Beethoven Conservatory |
| Beinke, Henry F., House |
| Beins, Henry, House |
| Bel Air Motel |
| Bellecourt Apartments |
| Bellefontaine Avenue Historic District |
| Bellerive Hotel |
| Bell, M. Fred, Rental Cottage |
| Bell, M. Fred, Speculative Cottage |
Data from United States Park Service and Wikidata
