Publishers
- Castell Brothers Ltd. 7
- Castle Books 1
- Castlemead Publications 2
- Caxton Editions 1
- Caxton Press 1
- Caxton Publishing Company Limited 2
- Cecil Palmer 5
- Cef Books 1
- Centaur Press Ltd 1
- Centennial Publishing 1
- Center For Air Force History 1
- Center Of Military History United States Army 1
- Central Books Limited 5
- Central European University Press 1
- Centre For Alternative Technology 1
- Century 4
- Century Benham 1
- Century Publishing 6
- Cerberus 1
- Cetre Et Fondation Le Grand-Cachot 1
- Ch. R. & Cie 1
- Chad Valley Books 2
- Chalford 1
- Challenge Publications Inc. 1
- Challenger Publications 16
- Chambers 1
- Chambre De Commerce De Grenoble 1
- Chameleon Publishing 1
- Champlin Fighter Museum Press 2
- Chancellor Press 6
- Channel 4 2
- Channel Four Books 2
- Chapel Hill 1
- Chapman & Dodd Ltd. 1
- Chapman & Hall 36
- Chapman & Hall Ltd 10
- Chapman & Hall/Crc 3
- Chapmans 1
- Chappell & Co. Ltd. 1
- Chappell Music Ltd. 2
- Charlcombe Books 1
- Charles Baldwyn 1
- Charles Birchall 1
- Charles E. Tuttle Company 1
- Charles Farlow 1
- Charles Griffin & Co. Ltd. 4
- Charles Griffin & Company Limited 1
- Charles H. Kelly 2
- Charles Knight 2
- Charles Scribner's Sons 23
- Charles Skilton 5
- Charles Skilton Ltd. 10
- Charles Taylor 1
- Charles Tilt 1
- Charles Wilson (booksellers) Limited 1
- Charta 14
- Chartwell Books Inc. 3
- Chartwell-Bratt 2
- Chas. J. Clark 2
- Chatford House Press Ltd. 3
- Chatham Publishing 8
- Chatto & Windus 76
- Chatto & Windus Ltd 1
- Chelsea House Publishers 3
- Chelsea Publishing Co. 3
- Chene 1
- Chesapeake & Ohio Historical Society, Inc. 1
- Cheshire And Wirral Ornithological Society 1
- Cheshire County Council 1
- Chester County Historical Society 1
- Chesterfield Borough Council 1
- Chevprime 2
- Chicago 2
- Child's Play (International) Ltd. 7
- Children's Digest Publications Ltd. 1
- Children's Leisure Products Ltd. 1
- Children's Special Service Mission 1
- Children's Universe 1
- Chiswick Press 4
- Chivers & Sons Ltd. 1
- Chorley & Pickersgill Ltd 1
- Choudens 1
- Chris Beetles Gallery 1
- Chris Beetles Ltd. 3
- Christian Stoll 1
- Christie, Manson & Woods Ltd. 1
- Christoph Seigel 1
- Christopher Davies 10
- Christopher Frost 1
- Christopher Helm 35
- Christopher Johnson 1
- Christophers 2
- Chronica Botanica Company 1
- Chronicle Books 7
- Chronicle Communications Ltd. 1
- Chronosports 8
- Chronosports Gsn Publishing 1
- Church Missionary Society 1
- Church Of England Zenana Missionary Society 1
- Cicada Books 1