Imd or IMD may refer to:

As a word
Imd, a giantess in Norse mythology, one of the nine Mothers of Heimdall

As an initialism
Institution or location
India Meteorological Department, the Indian government agency for meteorology and seismology
Indian Medical Department, the name of the medical department of the Indian army in 19th-20th century
Interactive Media Division, a division of the School of Cinematic Art, the University of Southern California, Los Angeles, California, USA
International Institute for Management Development (IMD), a business school located in Lausanne, Switzerland
International MTM Directorate, a federation of national MTM (methods-time measurement) associations
Internationales Musikinstitut Darmstadt, the organization responsible for the Darmstädter Ferienkurse

Medicine
Invasive meningococcal disease
Immune-mediated disease, any immune disorder or any disease secondary to immune responses
Inherited metabolic disorder, an inborn error of metabolism from inherited mutation (as opposed to one from de novo mutation)
Immunomodulatory drug (immunomodulator), a drug that adjusts immune function (Immunotherapy § Immunomodulators)
Immunodeficiency, weakness of the immune system
Immune-mediated diabetes, any type of diabetes with immune responses as a major causative factor
Immunizing dose, the dose sufficient to immunize (and IMD50 is the median value)
The Immune deficiency pathway (Imd pathway) of insects

Technology
Indigo Magic Desktop, the default Desktop Environment for IRIX (a UNIX variant by Silicon Graphics), in versions 5.1–6.4
Insulation monitoring device, a protection device or circuit in electric systems
Intermodulation distortion, the result of two (or more) signals of different frequencies being mixed together in a signal processing path, forming additional, unwanted signals

Other
Illinois Medical District, a special-use zoning district on the Near West Side of Chicago, Illinois, USA
Index of Multiple Deprivation
International Management District in Greater Houston
International Media Distribution
International Men's Day, an international event
International Museum Day, a celebration that is held each year on or about 18 May