Siak Regency

Siak, is a regency of Riau Province, on the island of Sumatra, Indonesia. It has an area of 8,275. 18 km² and had a population of 376,742 at the 2010 Census and 439,796 at the 2015 Census; the latest official estimate was 480,812. The administrative centre of the regency is located at Siak Sri Indrapura.