Mandau may refer to: Mandau River (Central Europe), a river in central Europe Mandau River (Indonesia), a river in northern Sumatra, Indonesia Mandau, a district of Bengkalis Regency, Riau province, Indonesia Mandau-class fast attack craft, a class of fast attack craft operated by the Indonesian Navy Mandau (knife), the traditional weapon of the Dayak people of Borneo
See also Mandaue, a highly-urbanized city in Cebu, Philippines