Marauder is a live album by the English rock band Magnum. It was released in 1980 on Jet Records. Magnum recorded Marauder over one night at London's Marquee Club on 15 December 1979. It was an attempt by Jet Records to revive the success of the debut album Kingdom of Madness following the failure of Magnum II. The album was recorded on multi-track by former-Ten Years After bass player Leo Lyons, who had recorded Magnum II, and mixed by Chris Tsangarides.

The eight-track live album was released in April 1980, entering the UK charts at No. 34. A four-track EP preceded the album's release in March 1980, called Live at the Marquee, featuring material from the same show. The EP charted within the Top 50 of the UK singles chart, and very nearly earned the band an appearance on Top of the Pops. Following this revival, "Changes" was re-released as a single, although in a remixed format. The 2005 expanded version of the album was reissued on 22 September 2006 in Japan with Mini LP/paper sleeve packaging through Arcangelo. The album was also included in a limited edition Japanese box set, comprising all six of Sanctuary Records expanded and remastered releases with Mini LP/Paper Sleeve packaging. The set included an outer box featuring Magnum's Chase The Dragon artwork.