AMSA can refer to:
- Advanced Manned Strategic Aircraft, project name for the Rockwell B-1 Lancer
- Advanced Math and Science Academy Charter School, a public charter school in Marlboro, Massachusetts
- American Meat Science Association
- American Medical Student Association
- American Men's Studies Association
- American Moving & Storage Association
- Association of Marist Schools of Australia
- Australian Maritime Safety Authority
- Aerolineas Mundo S.A.-AMSA, a Dominican airline from 1986-1997