Studio Albums:
- Styx (self-titled debut) – Released in July 1972.
- Styx II – Released in July 1973.
- The Serpent Is Rising – Released in October 1973.
- Man of Miracles – Released in November 1974.
- Equinox – Released in December 1975.
- Crystal Ball – Released in October 1976.
- The Grand Illusion – Released in July 1977.
- Pieces of Eight – Released in September 1978.
- Cornerstone – Released in October 1979.
- Paradise Theatre – Released in January 1981.
- Kilroy Was Here – Released in February 1983.
- Edge of the Century – Released in October 1990.
- Brave New World – Released in June 1999.
- Cyclorama – Released in February 2003.
- Big Bang Theory – Released in May 2005.
- The Mission – Released in June 2017.
Live Albums, Compilation Albums, and Other Releases:
- Caught in the Act (Live Album) – Released in April 1984.
- Return to Paradise (Live Album) – Released in October 1997.
- Styx Greatest Hits (Compilation Album) – Released in August 1995.
- 21st Century Live (Live Album) – Released in August 2002.
- One with Everything: Styx and the Contemporary Youth Orchestra (Live Album) – Released in April 2006.