WOI

Woi or WOI may refer to:


 * WOI (AM), a radio station (640 AM) in Ames, Iowa
 * WOI-FM, a radio station (90.1 FM) Ames, Iowa
 * WOI-DT, a television station in Ames, Iowa
 * Warrant Officer Class I, a rank in the British Armed Forces
 * Woi language, a Malayo-Polynesian language
 * Women's Organization of Iran, an Iranian women's rights organization