MRI may refer to:

• Magnetic resonance imaging, a medical imaging technique
• Magnetic Resonance Imaging (journal), a scientific journal
• Magnetorotational Instability
• Manchester Royal Infirmary, a hospital in Manchester, England
• Martin Ryan Marine Science Institute, or Martin Ryan Institute, a research facility at National University of Ireland, Galway
• Matz's Ruby Interpreter, the current C runtime for the Ruby programming language
• Mean Recurrence Interval
• Member of the Royal Institution
• Mental Research Institute, Palo Alto, United States
• Midwest Research Institute
• Moores Rowland International, an international accounting and auditing association of firms
• Mri (fictional alien species), a fictional alien species
• MRI BDE/MRI Customizer, the proprietary software used by Geek Squad
• The International Olympic Committee country code for Mauritius
• MRI, third studio album by french singer Charlotte Gainsbourg and american composer Beck, set for a 2010 release

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