Witu may refer to
Kenya Wituland or Witu Sultanate Witu, Kenya, capital of Wituland
Papua New Guinea Vitu language (which is also spelled Witu) Wiru (disambiguation) (which is also called Witu): Wiru people Wiru language
Poland Military Institute of Armament Technology (Polish: Wojskowy Instytut Techniczny Uzbrojenia)