IGM

IGM may refer to:


 * Initiative on Global Markets, at the University of Chicago Booth School of Business
 * IG Metall, German metalworkers' union
 * IGM Financial, Canada
 * Institut Gaspard Monge, at the University of Marne la Vallée
 * International Grandmaster, a chess title
 * Intergalactic medium
 * Kingman Airport (Arizona) (IATA Code: IGM)
 * Istituto Geografico Militare, Italian national mapping agency
 * Intersex genital mutilation

Medicine

 * Immunoglobulin M, an antibody