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 developed from an earlier band, True Wheel, (named after a song by Brian Eno from his 1974 LP Taking Tiger Mountain (By Strategy). Alison Statton (vocals), Philip Moxham (bass) and his brother Stuart (guitar and main songwriter), formed Young Marble Giants in 1979. Signed by the Rough Trade label, the band recorded Colossal Youth in a studio in North Wales.