Lamuri, Lamri, or Lambri was a kingdom in northern Sumatra, Indonesia recorded from the 9th century until the early 16th century. The area was inhabited by Hindu population around the seventh century. There is also evidence of Buddhism. The region is also thought to be one of the earliest places of arrival of Islam in the Indonesian archipelago, and in its later period its rulers were Muslims.

Sumatra is one of the Sunda Islands of western Indonesia. It is the largest island that is fully within Indonesian territory, as well as the sixth-largest island in the world at 475,807.63 km2 (182,812 mi.2), including adjacent islands such as the Simeulue, Nias, Mentawai, Enggano, Riau Islands, Bangka Belitung and Krakatoa archipelago.