Colossal Youth is the only studio album by Welsh post-punk band Young Marble Giants, released in February 1980 on Rough Trade Records. Young Marble Giants were offered the opportunity to record the album after Rough Trade heard just two songs by the band on the local Cardiff music compilation Is the War Over?

Young Marble Giants were a Welsh post-punk band formed in Cardiff, Wales, in 1978. Their music was based around the vocals of Alison Statton along with the minimalist instrumentation of brothers Philip and Stuart Moxham. Their early sound was a sharp contrast with the more aggressive punk rock that dominated the underground at the time. Young Marble Giants released just one studio album, Colossal Youth, in 1980. They also released two EPs and recorded a John Peel session.