Not to be confused with Riau Islands Province, a province (administrative) of Indonesia.The Riau Archipelago is a geographic term (as opposed to administrative region) for the core group of islands within the Riau Islands Province in Indonesia, and located south of Singapore. Before the province of Riau Islands was formed, there was no ambiguity in term, however; in Indonesian both the archipelago and islands are referred to as simply "Kepulauan Riau".