RSU may refer to: Universities Rangsit University, Pathum Thani, Thailand Riga Stradiņš University, Latvia Rivers State University, Nigeria Rogers State University, Oklahoma, United States Rostov State University, Russia Romblon State University, Philippines
Student unions Radical Students Union, a frontal organization of the Communist Party of India (Maoist), a Naxalite group Ryerson Students' Union, student organization at Ryerson University in Canada Roehampton Students Union, student organization at the University of Roehampton in the UK
Other Regional school unit, a type of school district in Maine, United States Restricted stock unit, a form of stock award Garda Regional Support Unit, of the Irish police Rough Sleepers Unit, a former UK government programme; see Rough Sleepers Initiative § Rough Sleepers Unit (RSU) RSU, ICAO code for AeroSur (1992-2012), a defunct Bolivian airline RSU, IATA code for Yeosu Airport in South Korea