A
- abolisjonister
- Adams, Charles Francis
- Adams, John
- Adams, John Quincy
- Adams, Samuel
- Alabama-saken
- America-First-Committee
- American Anti-Slave Society
- Andrews, Christopher Columbus
- Annapolis Convention
- Anti-Saloon League of America
- antiføderalister
- Arbeidets riddere
- Arnold, Benedict
- Arthur, Chester A.
- Astor, John Jacob
- Astor, John Jacob (IV)
- Attucks, Crispus
- Austin, Stephen Fuller
- Avilés, Pedro Menéndez de
- Awashonks