IDF commonly refers to the Israel Defense Forces, the combined military forces of Israel.
IDF may also refer to:
Defence forces Irish Defence Forces, the combined military forces of Ireland Iceland Defense Force, of the U.S. Armed Forces, 1951–2006 Indian Defence Force, a part-time force, 1917
Organizations Israeli Diving Federation International Diabetes Federation International DOI Foundation, of the digital object identifier Immune Deficiency Foundation
Places Île-de-France, a region of France Idiofa Airport, Kwilu, Democratic Republic of the Congo (IATA airport code: IDF)
Other uses Intensity-duration-frequency curve, for rainfall Intel Developer Forum Intermediate Data Format, a file format for electronic design automation Intermediate distribution frame, for telecommunications wiring AIDC F-CK-1 Ching-kuo, or Indigenous Defense Fighter, a Taiwanese aircraft Inverse Document Frequency, a factor in the tf–idf principle Indirect fire International Day of Forests
See also IDF1, a French TV channel