Corbett Marshall Lyon (born 13 August 1955) is an Australian architect, art patron and academic who lives and works in Melbourne.
He is a founding director of Melbourne architectural firm Lyons.
With partners Carey Lyon, Cameron Lyon (dec.), Neil Appleton, Adrian Stanic and James Wilson he has designed many award-winning institutional and public buildings in Australia.
Lyon is one of Australia's leading collectors and patrons of Australian contemporary art and since 1990 has developed the Lyon Collection with his wife Yueji.
In 2003–2008 he designed and built the Lyon Housemuseum, a hybrid residence and art museum, which displays the Lyon Collection and makes it available for public viewing.Lyon is a professorial fellow and visiting professor in design at the University of Melbourne where he teaches and researches in the Melbourne School of Design.
In 2016 he was awarded a Doctor of Architecture (honoris causa) by the University.