Sementa is a state constituency in Selangor, Malaysia, that has been represented in the Selangor State Legislative Assembly since 1959. It has been represented by Noor Najhan Mohamad Salleh of Perikatan Nasional (PN) since 2023.
The state constituency was created in the 1958 redistribution and is mandated to return a single member to the Selangor State Legislative Assembly under the first past the post voting system.
According to the federal gazette issued on 30 March 2018, the Sementa constituency is divided into 16 polling districts.