The Devil You Know is the only studio album by heavy metal band Heaven & Hell; the members had previously recorded as a group in an earlier line-up of Black Sabbath. The Devil You Know was Ronnie James Dio's final studio album prior to his death in May 2010.

Heaven & Hell was a American heavy metal supergroup active from 2006 to 2010, featuring guitarist Tony Iommi, bassist Geezer Butler, vocalist Ronnie James Dio and drummer Vinny Appice.