QSR

QSR may refer to:


 * QSR International, a qualitative research software developer based in Melbourne, Australia
 * QSR, a standardized Q code initially developed for commercial radiotelegraph communication
 * Quick service restaurant (also fast food restaurant), a specific type of restaurant that serves fast food cuisine and has minimal table service
 * Restaurant Brands International (stock symbol: QSR), a Canadian multinational fast food holding company
 * Salerno Costa d'Amalfi Airport (IATA code: QSR), an airport in southern Italy, near to Salerno