- Arik Lifschitz
- Aris L. Moustakas
- Aristide Mingozzi
- Arizona Department of Transportation
- Arizona State Student Chapter
- Arizona State University Student Chapter
- Arizona State University Student Chapter
- Arjun Madhavan
- Arkadi Nemirovski
- Arlen Dean
- Armagan Bayram
- Arman Sabaaghi
- Armand B. Weiss
- Armand Zakarian
- Arnd Huchzermeier
- Arne Lokketangen
- Arnie Greenland
- Arnold (Arnie) Greenland
- Arnold Greenfield
- Arnold I. Barnett
