Joe Lally (born December 3, 1963 in Silver Spring, Maryland) is a bass guitar player, primarily known for his work with Fugazi. He has also contributed occasional lyrics and vocals to Fugazi songs. In early 2002, Lally joined ex-Frodus members Shelby Cinca and Jason Hamacher on a project originally called The Black Sea, which would change its name to Decahedron and release an EP and an album before Lally left the band. He has also worked with John Frusciante and Josh Klinghoffer as the group Ataxia, releasing two albums: Automatic Writing (2004) and AW II (2007).