Schänis Abbey (German: Kloster Schänis) was founded in the 9th century. It was situated in the present town of Schänis in the Canton of St. Gallen , Switzerland . It was a house of secular canonesses of the nobility (German: adliges Damenstift) and was dissolved in 1811.

According to the report of a monk from Reichenau Abbey the founder was believed to be Count Hunfried of Chur -Rhaetia, who was said to have promised Charlemagne to make the foundation for the worthy safekeeping of a precious reliquary cross containing a fragments of the True Cross, as well as an onyx vessel containing some of the Blood of Christ. Such evidence as is available does indicate that the abbey was founded at about that time, possibly as a daughter foundation of St.