ISU

ISU may refer to:

United States

 * Idaho State University, Pocatello, Idaho
 * Illinois State University, Normal, Illinois
 * Illinois State University (Springfield, Illinois)
 * Indiana State University, Terre Haute, Indiana
 * Iowa State University, Ames, Iowa

Elsewhere

 * I-Shou University, Kaohsiung, Taiwan
 * Ifugao State University, in the Philippines
 * Ilia State University, in Tbilisi, Georgia
 * Imo State University
 * Ingush State University, in Magas, Republic of Ingushetia
 * International School of Uganda, Kampala, Uganda
 * International School of Ulaanbaatar, Mongolia
 * International Solomon University, in Ukraine
 * International Space University, Illkirch-Graffenstaden, France
 * Irkutsk State University, in Eastern Siberia

Organizations

 * ISU (trade union), British trade union formerly known as the Immigration Service Union
 * Integrated Security Unit, in Canada
 * Internal Security Unit, the counter-intelligence unit of the Provisional Irish Republican Army (IRA)
 * International Seamen's Union
 * International Skating Union

Other

 * Italian Service Units, Italian prisoner of war army units that served on the Allied side during World War II
 * ISU (singer)
 * Isu language (Bantu), also called Suwu or Subu, a Bantu language of Cameroon
 * Isu language, a Grassfields Bantu language of Cameroon
 * Isu, Nigeria, a local government area of Imo State
 * Isu people, an ethnic group in Nigeria
 * Isu station, on the Seoul Metropolitan Subway
 * ISU-152, ISU-122, Soviet self-propelled guns
 * SAP IS-U, Industry Specific Solution for Utilities
 * International System of Units, the SI system
 * ISU, the IATA airport code for Sulaimaniyah International Airport, Iraq