Delta 5 was a post-punk band from Leeds, England who were active from 1979 to 1981. Known for their distinctive sound characterized by sharp basslines, jagged guitar, and feminist-infused lyrics, the band was composed of members Julz Sale, Ros Allen, Bethan Peters, and Kelvin Knight. They are considered significant in the post-punk movement, and their most influential work is arguably the single "Mind Your Own Business". Despite their relatively short career, the influence of Delta 5 on the genre is still recognized today.