IU may mean:
- Universities
- Indiana University, a multi-campus public university system in the state of Indiana, United States
- a misnomer for IUP, Indiana University of Pennsylvania
- Ho Chi Minh City International University, a member institution of Vietnam Vietnam National University in Ho Chi Minh city
- International University, Cambodia, a private higher education institution in Phnom Penh, Cambodia
- International University in Germany, a university in Southern Germany
- Istanbul University
- Ittihad University (United Arab Emirates - Ras Al Khaimah)
- Organizations
- The IU, a Georgist political organization in London
- Intermediate Unit, a regional educational service agency in Pennsylvania
- Izquierda Unida ("United Left" in Spanish, political party):
- Izquierda Unida (Argentina)
- Izquierda Unida (Spain)
- People
- IU (singer), a Korean singer
- Other
- Instruction unit, the part of a computer CPU that manages instruction fetch and instruction issue
- Instrument Unit, a guidance system for the Saturn V rocket
- International unit, a unit for biological activity used in pharmacology
- Intonational unit, a segment of speech
- Inuktitut language (ISO 639 alpha-2)
Iu may refer to:
- the Iu interface, in the RANAP protocol