Lembah Jaya is a state constituency in Selangor, Malaysia, that has been represented in the Selangor State Legislative Assembly since 1995.

The state constituency was created in the 1994 redistribution and is mandated to return a single member to the Selangor State Legislative Assembly under the first past the post voting system.

Since 2023[update], the State Assemblyman for Lembah Jaya is Syed Ahmad Syed Abdul Rahman @ Altimet is from Pakatan Harapan PKR.

Ethnic breakdown of Lembah Jaya's electorate as of 2023[2] According to the gazette issued on 30 March 2018, the Ampang constituency has a total of 18 polling districts.

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