Aaron Turner (born November 5, 1977) is an American musician, singer, graphic artist, and founder of label Hydra Head Records. He is most widely known for his role as guitarist and vocalist for the post-metal bands SUMAC and Isis, while also participating in several other bands and projects such as Old Man Gloom, Lotus Eaters and Split Cranium, a collaboration with Jussi Lehtisalo of Finnish band Circle who toured with Isis in 2009.

Raised in New Mexico, Turner moved to the Boston area, where he attended art school and formed Isis and Hydra Head. In June 2003, Turner moved operations of both the band and label to Los Angeles, California. Turner now resides in Vashon, WA which is also the base of operations for Hydra Head and his various other activities.

In partnership with his wife Faith Coloccia, Turner founded another record label, SIGE, in March 2011. It has gone on to release material from his musical collaboration with Coloccia, Mamiffer. SIGE is distributed by The Business.