RSG

RSG may refer to:


 * Rabbi Saadia Gaon, 882–942 CE
 * Radio Sonder Grense, an Afrikaans radio station in South Africa
 * RSG Radio, a Serbo-Croatian radio station in Bosnia and Herzegovina
 * Randolph Street Gallery, Chicago, Illinois, US
 * Regional Seat of Government, UK Cold-War emergency headquarters
 * Ready Steady Go!, a 1960s British pop music TV show
 * Real Story Group, analyst firm formerly known as CMS Watch
 * Red supergiant, a kind of star
 * Real Sporting de Gijón, a Spanish football team
 * Rocket Science Games, a defunct video game developer
 * RS Group, entertainment & media company in Thailand
 * RS Group plc, electronics & industrial distributor in England