RMA may refer to:
Business and technology Return merchandise authorization, returning goods to the supplier for repair or replacement Rogue Music Alliance, American independent record label Radio Manufacturers Association, standards and trades association from 1924–1950 Regionalmedien Austria, Austrian media company Reliability, Maintainability, and Availability analysis, in reliability and systems engineering Relationship Management Application, a service offered by SWIFT Rate-Monotonic Analysis, the qualitative method used to prepare a system for Rate-monotonic scheduling U.S. Rubber Manufacturers Association
Education Randolph-Macon Academy, a preparatory school in Virginia, United States Rubin Museum of Art, a museum in New York City Riverside Museum Associates, a non-profit that supports the Riverside Metropolitan Museum, California Royal Musical Association, British musicological organization
Government and law Resource Management Act 1991, an Act of Parliament in New Zealand Respect for Marriage Act, a 2022 United States federal law that protects same-sex and interracial marriages. Richmond Metropolitan Authority, an authority in Richmond, Virginia Regional Mobility Authority, an independent local government transportation agency in the U.S. state of Texas Risk Management Agency, an agency of the United States Department of Agriculture Reedley Municipal Airport, a public airport in Reedley, California
Medicine Refusal of medical assistance, where a patient or their medical power of attorney refuses treatment or transport to a hospital by emergency medical services. Registered medical assistant, in jurisdictions where "medical assistant" is a protected title
Military Rocky Mountain Arsenal, near Denver, Colorado Royal Marine Artillery, formerly a part of the Royal Marines Royal Military Academy (disambiguation), several military institutions Reichsmarineamt, the Admiralty of Imperial Germany's navy (historic) Revolution in Military Affairs, the recent rapid development of military technology and its corresponding impact on warfare
Other Contracted form of Real Madrid CF, a football club in Spain MTV Russian Music Awards Roma Airport, IATA airport code "RMA" Rma, known as Qiang language, a Sino-Tibetan language cluster