- Atkinson, Edward, 1827-19051
- Atkinson, I. Edmondson (Isaac Edmondson), 1846-1906 author1
- Atkinson, William Walker, 1862-1932 author1
- Atlee, Washington L. (Washington Lemuel), 1808-18781
- Atomic Bomb Casualty Commission, author.1
- Attwell, Mabel Lucie, 1879-1964, artist1
- Atwater, Caleb, 1778-18671
- Atwater, W. O. (Wilbur Olin), 1844-1907, author1
- Atwool, Courtenay.1
- Aubry, Charles.1
- Auerbach, John, author1
- Aulde, John, 1846- author1
- Austin, David A.1
- Averill, Chester, 1804-18361
- Avery, John, 1824-1914, author1
- Axson, A. Fontes1
- Ayre, Joseph, 1781-18601
- Babcock, Amos G.1
- Bachman, John, 1790-18741
- Bachman, Walter J.1