- Achelis, Elisabeth, 1880-19731
- Achenbach, G. H1
- Achudume, Albert C.1
- Ackerman, Elizabeth W., 1949-4
- Ackerman, G. W.9
- Ackerman, Virginia MacMahon, 1939-2
- Acket, Lucy2
- Acklen, Ehrai W.1
- Acklin, Vinnie E.1
- Acme Newspictures (New York, N.Y.)7
- Acme Photo (New York, N.Y.)1
- Acmie Lab1
- Acosta-Belén, Edna1
- Acox, Etheline J.1
- Active Voters1
- Acuff, J. W. (James W.), 1864–19371
- Acuff, Stewart, 1954-1
- Acuff-Rose Artists Publications1
- Ad Hoc Committee in Defense of Life148
- Ad Hoc Committee to Defend the Right to Teach1
