St. Florian Monastery (German: Stift Sankt Florian) is an Augustinian monastery in the town of Sankt Florian, Austria. Founded in the early ninth century, and later refounded by Augustinians in the eleventh century.

The monastery, named after Saint Florian, was founded in the Carolingian period. Since 1071 it has housed a community of Augustinian Canons. St. Florian's Priory possesses two organs, the larger one of which is known as the "Bruckner organ" (Brucknerorgel) and contains four manuals, 103 stops and 7,343 pipes.It was played by composer and organist Anton Bruckner, previously a choirboy at the monastery, when he was the organist, between 1848 and 1855. He is buried beneath the organ inside the church.