IDU

Idu or IDU may refer to:
 * Indoor unit of an Australian National Broadband Network fixed wireless connection, see NTD (NBN)
 * International Democrat Union, an international alliance of political parties
 * Idu, Iran, a village in Razavi Khorasan Province, Iran
 * Idu, Abuja, a neighbourhood of Abuja, Nigeria
 * Idu script, archaic writing system that represents the Korean language using hanja
 * Idu Mishmi language, the language of the Idu Mishmi people
 * Hongcheon Idu FC, South Korean football club
 * Injecting drug user, see Drug injection
 * Idu G7102, an official during the Sixth Dynasty of Egypt, buried in tomb G7102 of the Giza East Field
 * Idu (novel), a 1970 novel by Flora Nwapa