For the federal constituency represented in the Dewan Rakyat, see Sepang (federal constituency). The Sepang District is a district located in the southern part of the state of Selangor in Malaysia. Formerly a small town, Sepang grew to its current size through several recent developments. Sepang District covers an area of 612 square kilometres, and had a population of 212,050 at the 2010 Census (provisional result).