Riau is a province of Indonesia.
Riau may also refer to:
Riau Islands, province of Indonesia Riau Archipelago, part of Riau Islands Province Riau-Lingga Sultanate, a Malay Sultanate that once governed Riau-Lingga Archipelago Riau Residency, administrative unit of the Dutch East Indies Revolutionary Insurgent Army of Ukraine (RIAU)
See also Riau Airlines Riau University Miguel Ángel Riau