Infernäl Mäjesty is a Canadian heavy metal band, formed in Vancouver(BC) in 1986. They are best known for their debut album None Shall Defy, released in 1987. However, the 1998 re-issue by Displeased Records inspired the band to get back together and recorded a new album, followed by a European tour. They are still active.

They are not to be confused with HIM, who were previously called 'His Infernal Majesty'.