Mexican Texas
- Alamán y Escalada, Lucas
- Alamo
- Alcalde
- Alcantra, Battle of
- Aldrete, José Miguel
- Alguacil
- Allcorn, Elijah
- Allen, Augustus Chapman
- Allen, Charlotte Marie Baldwin
- Allen, John Kirby
- Allen, Martin
- Alley, John
- Alley, John C.
- Alley, Rawson
- Alley, Thomas V.
- Alley, William A.
- Almonte's Report On Texas
- Almonte, Juan Nepomuceno
- Alsbury, Charles Grundison
- Alsbury, Horace Arlington
- Alsbury, James Harvey
- Alsbury, Thomas
- Anahuac Disturbances
- Anahuac, TX
- Anderson, Bailey, Sr.
- Anderson, Hannah English Payne
- Anderson, Simeon Asa
- Andrews, John
- Andrews, Stephen Pearl
- Andrews, William
- Angier, Samuel Tubbs
- Anglo-American Colonization
- Arciniega, José Miguel de
- Aury, Louis Michel
- Austin, James Elijah Brown
- Austin, Stephen Fuller
- Ayuntamiento
- Bailey, James Briton
- Balis, Daniel E.
- Banco Nacional de Texas
- Barnett, Thomas
- Barrett, William
- Barron, Thomas Hudson
- Bastrop, Baron de
- Battle, Mills M.
- Beales's Rio Grande Colony
- Beales, John Charles
- Bean, Peter Ellis
- Beard, James
- Beeson, Benjamin