Kota Raja is a federal constituency in Klang District and Petaling District, Selangor, Malaysia, that has been represented in the Dewan Rakyat since 2004.
The federal constituency was created in the 2003 redistribution and is mandated to return a single member to the Dewan Rakyat under the first past the post voting system.
According to the federal gazette issued on 18 July 2023, the Kota Raja constituency is divided into 46 polling districts.