Sakai is one of the tribes in Indonesia who live in the interior of Riau, Sumatra. Sakai is a Minangkabau descent who migrated to the edge of Gasib River, upstream of Rokan River, Riau hinterland in the 14th century. As with Kampar, Kuantan, and Indragiri people, Sakai is a community of Pagaruyung who migrated to the Riau mainland centuries ago. Most of the Sakai community living as a farmer. There are no definite data about the number of Sakai. Population data issued by the Ministry of Social Affairs Republic of Indonesia stated that the number of Sakai in Bengkalis Regency of 4,995 inhabitants.
- Abramson, Allen; Theodossopoulus, Dimitrios (2000-11-20). Land, Law and Environment: Mythical Land, Legal Boundaries. Pluto Press. pp. 177–. ISBN 9780745315706. Retrieved 27 February 2014.
- Suparlan, Parsudi (1993). Orang Sakai di Riau: Masyarakat Terasing dalam Masyarakat Indonesia. Jakarta: Yayasan Obor. p. 72.
- Suparlan, Parsudi (1993). Orang Sakai di Riau: Masyarakat Terasing dalam Masyarakat Indonesia. Jakarta: Yayasan Obor. p. 89.