Martin Clayton, LVO, FSA, (born 1967) is Head of Prints and Drawings for Royal Collection Trust at Windsor Castle. He is a specialist in the drawings of Leonardo da Vinci.
Martin Clayton was born in Harrogate, North Yorkshire on 30 December 1967 to David and Brenda Clayton. He was educated at King James's School, Knaresborough, and from 1986 to 1990 at Christ's College, University of Cambridge, where he studied Natural Sciences and History of Art, graduating with a first. He credits his interest in art to a school trip to the Hermitage Museum in St Petersburg where he was fascinated by the chisel marks on a sculpture there.
After graduating, Clayton began to work in the Print Room of the Royal Library, Windsor Castle, as Assistant Curator, subsequently becoming Deputy Curator, Senior Curator, and (in 2013, on the retirement of Jane Roberts) Head of Prints and Drawings. He has curated many exhibitions in the UK and internationally based on material in the royal collection and written the corresponding catalogues. He is a specialist in the drawings of Leonardo da Vinci.
Clayton is the editor of the natural history volumes of the catalogue raisonné of the Paper Museum of Cassiano dal Pozzo, the major part of which is held in the Royal Library at Windsor. He also co-wrote the volume on Cassiano's Aztec Herbal with Luigi Guerrini and Alejandro de Ávila.
Clayton was made a Lieutenant of the Royal Victorian Order (LVO) in the 2015 New Year's honours list.