Riau (disambiguation)

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)