Suar or Suvar principality was a medieval statelet subject to Volga Bulgaria.
The principality appeared around the 940s CE. The population was a mix of Turkic Sabirs and local Turkic- and Uralic-speaking tribes such as the Mari. The capital city was Suar, whose ruler was titled "Bäk" (cf. Khazar "Bek"; Turkish "Bey".)
In 975 the principality was absorbed by Volga Bulgaria. From the 11th to 13th centuries, it was a semiautonomous province, until the Mongols conquered the state.