| Acronym | Definition |
|---|
| MASA | Macedonian Academy of Sciences and Arts (est. 1967) |
| MASA | Medical Association of the State of Alabama |
| MASA | Michigan Association of School Administrators |
| MASA | Make America Smart Again (slogan) |
| MASA | Minnesota Association of School Administrators |
| MASA | Missouri Association of School Administrators |
| MASA | Mothers Against Sexual Abuse |
| MASA | Medical Air Services Association (Southlake, Texas) |
| MASA | Men Against Sexual Assault |
| MASA | Medical Association of South Africa (RSA) |
| MASA | Mexican American Student Association |
| MASA | Mount Ashland Ski Area (Oregon) |
| MASA | Milwaukee Area Skywarn Association |
| MASA | Manassas Area Soccer Association (Manassas, Virginia) |
| MASA | Mesures Actives de Sûreté Aérienne (French: Active Air Defence Measures) |
| MASA | Medical Acronym, Symbols and Abbreviations |
| MASA | Modular Avionics System Architecture |
| MASA | Mail Advertisers Service Association |
| MASA | Member of the Acoustical Society of America |
| MASA | Member of the Astronomical Society of Australia |
| MASA | Seaman Apprentice, Machine Accountant Striker (Naval Rating) |
| MASA | Malaysian Achehnese Students Association |
| MASA | Musicians Against Substance Abuse |
| MASA | Mid-America Soccer Association (Overland Park, Kansas) |