Kızılsu is a village located in the Şırnak Province of Turkey. Administratively, it is part of the Şırnak Central District (Turkish: Şırnak Merkez), which is the central district of the province.
The village is situated in the Southeastern Anatolia Region of Turkey, an area known for its rugged and mountainous topography. Like many rural settlements in the region, Kızılsu's economy is primarily based on traditional agricultural activities and animal husbandry.
The population of Kızılsu, consistent with the broader demographics of Şırnak Province, is predominantly composed of ethnic Kurds. The climate of the region is characterized by hot, dry summers and cold, often snowy winters.