Sungai Tua is a state constituency in Selangor, Malaysia, that is represented in the Selangor State Legislative Assembly from 1995 to 2004, and then since 2018. It has been represented by Menteri Besar Amirudin Shari of Pakatan Harapan (PH) since 2018.
The state constituency was created in the 1994 redistribution and was 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 Sungai Tua constituency is divided into 12 polling districts.