FMI may refer to:
- Danish Defence Acquisition and Logistics Organization, abbreviated FMI in Danish.
- Finnish Meteorological Institute
- First Myanmar Investment
- FMI Air, a Burmese airline
- Folkebevegelsen mot innvandring, a Norwegian anti-immigration group
- Food Marketing Institute
- Foundation Medicine, an American biotechnology company
- Freedom Movement of Iran
- Friedrich Miescher Institute for Biomedical Research, Switzerland
- Functional Mock-up Interface
- International Monetary Fund, in French, Spanish, Portuguese and Italian "FMI", or "Fonds monétaire international"
- Kalemie Airport, in Katanga Province, Democratic Republic of the Congo