Olias of Sunhillow is the debut studio album by English singer-songwriter Jon Anderson, released on 9 July 1976 by Atlantic Records. When the progressive rock band Yes took a break in activity in August 1975 for each member to record a solo album, Anderson, having established himself as their frontman, decided upon a concept album that tells the story of four tribes of an alien race and their journey to a new planet after their home is threatened by a volcanic eruption. Olias, a magician, builds a spacecraft named the Moorglade Mover and is helped by fellow magicians Ranyart and Qoquaq to gather and carry the population to their new home.

Jon Roy Anderson is an English-American singer, songwriter and musician, best known as the former lead singer of the progressive rock band Yes, which he formed in 1968 with bassist Chris Squire. Renowned for his alto tenor range, he was a member of the band across three tenures until 2008. Anderson was also a member of ARW along with former Yes bandmates Rick Wakeman and Trevor Rabin from 2016 to 2020. Together with bassist Lee Pomeroy and drummer Lou Molino III, they toured under the name Yes Featuring Jon Anderson, Trevor Rabin, Rick Wakeman.