Metal Circus is an EP by Hüsker Dü, released in 1983. As one of their early records, it was largely rooted in the band's initial hardcore punk style. However, signs of a new, poppier influence emerge on Metal Circus, particularly in the songs sung by Grant Hart ("It's Not Funny Anymore" and "Diane"). It also features some of Bob Mould's most passionate singing and shows further development in his guitar playing. Harmonic, chorus-type effects applied to Mould's guitar are more prominent. The change from the furious hardcore moments of Land Speed Record and Everything Falls Apart towards increasing melodicism hints at the groundbreaking new approach that was to be seen on the band's next release, Zen Arcade.
The horrific murder depicted in the anguished "Diane" is based upon the murder of West St. Paul waitress Diane Edwards by Joseph Ture in 1980. The song was covered by the band Coffin Break in 1989, Irish band Therapy? in 1995, Superdrag in 1998 and Gravenhurst in 2004 .
This EP was almost released as a 30 minute album with 11 songs. The outtakes were "Standing by the Sea" (later used on Zen Arcade), "Today's the Day", "You Think I'm Scared", and "Won't Change".