Western Illinois University is a public university in Macomb, Illinois, US.

WIU may also refer to:

Wadi International University, in Wadi al-Nasara, Syria Washington International University, an online unaccredited university Webber International University, in Babson Park, Florida, US Wiru language (ISO 639-3: wiu) Wiu, a Brazilian rapper

See also

Wii U, Nintendo home video game console