Sepang is a town and district located in the southern part of the state of Selangor in Malaysia. Formerly a small town, Sepang grew to 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); it is perhaps best known for hosting the Sepang International Circuit and as the site of the Kuala Lumpur International Airport, which serves Kuala Lumpur.