Barker was born in London on 1916, the younger brother of the poet George Barker. In 1948 he married the writer Ilse Gross (1921–2006), who wrote under the pen name Katherine Talbot.
Barker served in the British Army from 1942 to 1945.
Barker lived in Cornwall from 1947 to 1948, where he and Ilse were involved with the artists' colony in St Ives.
In 1949 Kit and Ilse Barker they travelled to the USA where Kit lectured at Skidmore College in New York. Kit later taught with Hassel Smith, Elmer Bischoff and David Park at the California School of Fine Arts in San Francisco (1951–1952). During their time in the USA, Kit and Ilse Barker stayed at Yaddo artists' community in Saratoga Springs, New York.
From 1953 Barker lived on Bexley hill, Sussex and travelled extensively in Europe and the US.
Kit and Ilse Barker had one son, Thomas (born 1962).
Kit Barker died in West Sussex in 1988.
Barker was a self-taught artist. His influences included the surrealists – he exhibited some surrelaist paintings.
His work is found in private collections in Australia, Brazil, Canada, Ireland, the United Kingdom, Mexico, Italy, South Africa, Sweden, the United States and Germany.
Barkers works have been purchased by:
Olsen Foundation, US
Contemporary Art Society, London
Magdalen, Nuffield, New and Pembroke Colleges, Oxford
Memorial Art Gallery, Rochester NY, USA
Towner Art Gallery, Eastbourne, UK
Bradford City Art Gallery
West Riding of Yorkshire Education Committee
Nottingham Training College
Aberdeen Art Gallery
Nuffield Foundation Pictures for Hospitals Fund
Isle of Wight Health Authority Pictures for Hospitals
Arts Council of Great Britain
1950 Weyhe Gallery, New York
1951 Palace of the Legion of Honor, San Francisco
1951 St. Louis Artists' Guild, St Louis
1957 Hanover Gallery, London
1959 Waddington Galleries, London
1960 Waddington Galleries, Montreal
1961 Waddington Galleries, London
1964 Waddington Galleries, London
1965 Waddington Galleries, Montreal
1966 Waddington Galleries, London
1967 Waddington Galleries, Montreal
1970 Arthur Tooth & Sons, London
1971 Villiers Art Gallery, Sydney, Australia
1972 Toorak Gallery, Melbourne, Australia
1972 Arthur Tooth & Sons, London
1978 Christ's Hospital Arts Centre, Horsham, Sussex
1981 The New Arts Centre, London
1988 Newburg Street Gallery, London
2001 University College Chichester, Otter Gallery, Sussex
2005 The Canon Gallery Petworth, Sussex
Barker had regular one man exhibitions throughout the 1960s and 1970s at: The David Paul Gallery, Chichester, Sussex; Reid Gallery, Guildford, Surrey and Century Galleries, Henley on Thames.
1948 The Crypt Gallery, St Ives, Cornwall
1948 Downings Bookshop, St Ives, Cornwall
1948 St George's Gallery, London
1949 Durlacher Gallery, New York, NY
1951 Whitney Museum of Art, New York, NY
1951 Philadelphia Art Alliance, PA
1952 Art Institute of Chicago, IL (Drawings from 12 countries)
1954 Institute of Contemporary Arts, London (Eight Painters)
1957 John Moores Exhibition, Liverpool
1959 Contemporary Art Society, London (Recent Acquisitions)
1960 Irish Exhibition of Living Art
1960 Birmingham City Art Gallery (Contemporary British Painters)
1960 International Gallery, Chicago, IL
1961 Memorial Art Gallery, Rochester, NY (Two Painters)
1962 Festival of Arts, Battle, Sussex
1967 Worthing Municipal Art Gallery, Sussex (Two Painters)
1969 Camden Arts Centre, London (English Traditional Landscape)
1973 Paintings in Hospitals, London
1974 Festival of the City of London, London
1976 Madden Gallery, London
1981 New Arts Centre, London
1985 Parkin Gallery, London (Cornwall 1925 -1975)
1987 Questra Gallery, Kingston upon Thames, SU
1990 Birch and Conran Gallery, London
Frost and Reed [Venture] prints, 'Marsh Brasses & Inner Harbour, Concarneau 1964.
Winter At Gurnard's Head, poem poster with David Wright MidNAG 1979.
Curlew, poem poster with Leslie Norris Armstrong poem poster 1969.
North Haven, poem poster with Elizabeth Bishop Lord John Press 1979.