FDI may refer to:

Finance

• fDi magazine, a British foreign direct investment publication

• Federal Deposit Insurance Corporation, a United States government corporation

• Foreign direct investment, purchase of an asset in a country by another country's company

Computing

• Field Device Integration, an International Electrotechnical Commission standards

• Flexible Display Interface

• Formatted Disk Image, part of the Unified emulator format

Health and medicine

• FDI World Dental Federation

• First dorsal interosseous, muscle in the hand

Politics

• Brothers of Italy (FdI, from the Italian name Fratelli d'Italia), an Italian political party

• Foundation for Democracy in Iran, a US-based Iranian dissident organization

Other uses

• Fault detection and isolation, in control engineering

• Films Division of India, a government-owned film production company in India

• , a class of frigates of the French Navy