MGA

• Malagasy ariary, the ISO 4217 code for the currency of Madagascar
• Marriott's Great America, now Six Flags Great America in Gurnee, IL and Paramount's Great America in Santa Clara, CA
• Matrox
• Metal Gear Acid - a PlayStation Portable video game by Konami
• Midwestern Governors Association, a nonprofit organization comprised of the 12 American Midwest states' governors.
• Monochrome Graphics Adapter
• Monongahela Railway
• Mounted Games Association
• Myasthenia Gravis Association
• MGA Entertainment, a private toy company, who manufacture the world famous Bratz dolls.
• Managing General Agent
• The IATA code for Managua International Airport
• The subsidiary of Mitsubishi.

MGA can also refer to the MG MGA, a popular British sports car manufactured between 1955 and 1962 by MG.