* Geezer Butler – bass, co-lead vocals (1968–present)
* Ozzy Osbourne – lead vocals (1968–1979, 1985–1992, 1997–2006, 2011–present)
* Bill Ward – drums (1968–1980, 1983–1984, 1994, 1997–2006, 2011–present)
Former members
* Dave Walker – lead vocals (1977–1978)
* Ronnie James Dio – lead vocals (1979–1982, 1991–1992, 2006–2010)
* Ian Gillan – lead vocals (1983–1984)
* Glenn Hughes – bass, lead vocals (1985–1986)
* Ray Gillen – lead vocals (1987–1989)
* Tony Martin – lead vocals (1987–1991, 1993–1996)
* Vinny Appice – drums (1980–1982, 1991–1992, 1998–2006)
* Geoff Nicholls – keyboards (1979–2004)
* Adam Wakeman – keyboards (2004–2017)