A
- Allegra Abbruzzese
- Zara Fatima Abdurahaman
- Dan Abel
- Andrea M. Abler
- Lisa Abraham
- Joie D. Acosta
- Marina Acosta
- Avery Adams
- Christopher Scott Adams
- Anca Agachi
- Denis Agniel
- Jair Aguirre
- Sangeeta C. Ahluwalia
- Mohammad Ahmadi
- Salman Ahmed
- Martha Aitken
- Elie Alhajjar
- Brien Alkire
- Samuel D. Allen
- Jeff Alstott
- Amal Altwaijri
- Gabriela Alvarado
- Cristina Alvarez
- James M. Anderson
- Graham Andrews
- C. Ross Anthony
- Shamena Anwar
- Naoko Aoki
- Eric Apaydin
- Maria Chiara Aquilino
- Ismael Arciniegas Rueda
- Charles P. Armentrout
- Philip Armour
- Lester Arnold, Sr.
- Beth J. Asch
- J. Scott Ashwood
- Kelly Atkinson
- Aurelia Attal-Juncqua
- Catherine H. Augustine
- John A. Ausink
- Casey Aveggio
- Lynsay Ayer