Steiri (Greek: Στείρι) is a village in Boeotia, Greece. It is situated at the western end of Mount Helicon, the mythical mountain of the Muses, at 450 m elevation. In 2001 its population was 1,010. The 10th century Hosios Loukas monastery, a World Heritage Site, is situated near Steiri. Steiri is 4 km southeast of Distomo and 15 km west of Livadeia.