Idu or IDU may refer to:Indoor unit of an Australian National Broadband Network fixed wireless connection, see NTD (NBN) International Democracy Union, an international alliance of conservative 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 Izmir Democracy University, a public university located in Izmir, Turkey