The Sarine (French: [saʁin]; Arpitan: Sarena [ʃaʁˈnɑ] ) or Saane (German: [ˈzaːnə]) is a major river of Switzerland. It is 128 km (80 mi) long and has a drainage area of 1,892 km2 (731 sq mi). It is a tributary of the Aare.

The Sarine rises in the Bernese Alps, near Sanetschhorn, in the Canton of Valais. It forms the Lac de Sénin (French; German: Sanetschsee) reservoir at 2034 m, and then enters the Canton of Bern, traversing the Sanetsch falls between 1900 and 1400 m. It then forms the westernmost valley of the Bernese Oberland, flowing past Gsteig, Gstaad and Saanen in the Obersimmental-Saanen district.