Riau-Lingga Sultanate (Jawi: کسلطانن رياوليڠݢ, romanized: Kesultanan Riau-Lingga), also known as the Lingga-Riau Sultanate, Riau Sultanate or Lingga Sultanate was a Malay sultanate that existed from 1824 to 1911, before being dissolved following Dutch intervention.
The sultanate came into existence as a result of the partition of the Johor-Riau Sultanate that separated Johor on the Malay Peninsula and the island of Singapore, from the Riau Archipelago. This partition followed the succession dispute following the death of Mahmud III of Johor, when Abdul Rahman was crowned as the first Sultan of Riau-Lingga. The maritime kingdom was recognised by both the British and the Dutch following the Anglo-Dutch Treaty of 1824.