Colin Ivor Moulding (born 17 August 1955, Swindon, Wiltshire, England) is an English bassist, songwriter and vocalist. He is a founding member of the band XTC. Though less prolific than bandmate Andy Partridge, Moulding wrote many of the group's most popular songs, including their first three UK hit singles: "Life Begins At The Hop", "Making Plans For Nigel", and "Generals and Majors". "Making Plans For Nigel" was also a Top 20 hit in Canada, and "Generals and Majors" was the band's first U.S. chart entry, peaking at #104 in 1980.

Moulding's bass playing is self-taught, learning 1970s rock riffs at 15 years old. He cites an early musical influence as Andy Fraser of Free and has stated a preference for an intuitive approach to writing and playing rather than study.

Outside of his work with XTC (and their alter-ego side project The Dukes of Stratosphear), Moulding released a non-charting solo single ("Too Many Cooks In The Kitchen" b/w "I Need Protection") in 1980 under the pseudonym "The Colonel". He later played bass and co-produced one track on the 1994 Sam Phillips album Martinis and Bikinis, and in 2005, he contributed to Billy Sherwood's Pink Floyd tribute album Return to the Dark Side of the Moon, playing bass and singing lead vocal on "Brain Damage." It has also been announced that Moulding will be appearing on Sherwood's next album.

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