Medium 21 were a rock band from Northampton, England.

Members Jon Clough, Drew Kent and Paul Thornton met whilst studying at Northampton College back in 1999. The original three-piece were later joined by Craig Brown to add extra depth on guitars, keyboards and vocals.

Medium 21 released several one-off EPs between 2000 and 2003. These have been on various labels including the independent Outafocus and much acclaimed indie label, Fierce Panda. It was Fierce Panda’s sister label, Temptation Records who signed the band after the success of the Plans Are Not Enough EP. The band received airplay from Radio 1 including a sessions for Steve Lamacq and Mark and Lard. They also featured on London based radio station, XFM. Their sole album Killings From The Dial, released in March 2003, was produced by Tim Rowkins.

Medium 21 split in 2004.