Tanjong Sepat is a state constituency in Selangor, Malaysia, that has been represented in the Selangor State Legislative Assembly since 2004.

The state constituency was created in the 2003 redistribution and is mandated to return a single member to the Selangor State Legislative Assembly under the first past the post voting system.

Ethnic breakdown of Tanjong Sepat's electorate as of 2023[1] According to the federal gazette issued on 30 March 2018, the Tanjong Sepat constituency is divided into 14 polling districts.

"Federal Government Gazette - Notice of Contested Election, State Legislative Assembly for the State of Selangor [P.U.

Attorney General's Chambers of Malaysia.