The three letter acronym RMI can refer to:

• Federico Fellini International Airport (IATA airport code)
• Radio Magnetic Indicator, an instrument used in navigation in aircraft
• Radio Massacre International, a British electronic-music group
• Ramapo Mountain Indians, a Native American group
• Raza Microelectronics Inc, a manufacturer of CPUs
• Remote Method Invocation in the Java programming language
• Repetitive motion injury, usually RSI
• Replika Maschinen Inc., a firm that hops-up car and motorcycle engines
• Republic of the Marshall Islands, a nation-state in Micronesia
• revenu minimum d'insertion, a form of welfare introduced in France in 1988
• RIFF MIDI file used in Microsoft Windows
• Rocky Mountain Institute, a non-profit energy-conservation organization
• Rocky Mount Instruments, manufacturer of the RMI 368 Electra-Piano and Harpsichord

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