IRG

IRG may stand for:


 * IATA airport code for Lockhart River Airport
 * Ideographic Research Group on coded Han character sets
 * Intelligent Robotics Group
 * International Resources Group, a professional services firm
 * Iranian Revolutionary Guard
 * International Ratings Group, a credit ratings agency
 * Interest rate guarantee, a financial instrument
 * Island Reggae Greats
 * Immunity Related Guanosine Triphosphatases (IRGs)