MMA may refer to:
- Ma malakat aymanukum, a term from the Quran
- Medicare Prescription Drug, Improvement, and Modernization Act, aka the "Medicare Modernization Act," a 2003 US law.
- Methyl Methacrylate Monomer, a chemical compound
- Metropolitan Museum of Art, a museum in New York City
- Mixed martial arts, a combat sport using martial arts skills including wrestling, grappling and striking.
- Muttahida Majlis-e-Amal, a coalition of religious political parties in Pakistan.
Commerce
- MacRobertson Miller Airlines, a Western Australian airline that operated from 1934 into the 1980s.
- Maldives Monetary Authority, a central bank
- Manufacturer's Mutual Association, the former name of the Association of Licensed Automobile Manufacturers.
- Money market account, a type of deposit account
- Montreal, Maine and Atlantic Railway, a North American regional freight railroad
- MMA, a financial services firm located in Elkhart, Indiana
Technology
- Manual metal arc welding, a common arc welding method
- MIDI Manufacturers Association, caretaker of the MIDI specification.
- Mobile Media API
- Multimission Maritime Aircraft, the project name for the P-8 Poseidon, a US Navy program.
- Multi-path Management API
Medicine
- Maxillomandibular advancement, a type of jaw surgery.
- Methylmalonic acidemia, a genetic disorder.
- Monomelic amyotrophy, a disease of the lower motor neurons.
Schools
- Maine Maritime Academy, a US public college
- Marine Military Academy, a boarding school based off the United States Marine Corps.
- Massachusetts Maritime Academy, a US state college
- MultiMediaArt, a study path at the Salzburg University of Applied Sciences, Austria
