RRG

RRG may be:
 * Plaine Corail Airport, IATA code for the airport on the island of Rodrigues, Mauritius
 * Reichs-Rundfunk-Gesellschaft, a network of German broadcasting companies
 * Rhön-Rossitten Gesellschaft, a German gliding organization
 * Role and Reference Grammar, a model of natural language grammar
 * Rolls-Royce Ghost, a luxury saloon car