Publishers
- Carmarthan Journal 1
- Carmarthenshire County Council 1
- Carnival 3
- Carnyx Group 1
- Carol & Chris Cashmore 1
- Caroline Downey 2
- Carousel 1
- Carreg Gwalch 1
- Carwal Publications, Ltd. 1
- Casdec Ltd 1
- Casemate 5
- Cassell 38
- Cassell & Co. 16
- Cassell & Co. Ltd. 38
- Cassell & Company Limited 58
- Cassell & Company Ltd 59
- Cassell Petter & Galpin 6
- Cassell, Petter, Galpin & Co. 4
- Castell Brothers 5
- Castell Brothers Ltd. 7
- Casterman 1
- Castle Books 1
- Castle Publications 1
- Castlemead Publications 3
- Cathay Books 1
- Cavendish House 1
- Caxton Editions 2
- Caxton Press 1
- Caxton Publishing Company Limited 5
- Cecil Palmer 5
- Cef Books 1
- Cemais Publications 1
- Center For Air Force History 1
- Center For The Study Of Language And Information 1
- Center Of Military History United States Army 1
- Central Books Limited 3
- Centre For Alternative Technology 1
- Centro De Estudos Ornithologicos No Algarve 1
- Century 5
- Century Benham 1
- Century Publishing 5
- Cerberus 2
- Cetre Et Fondation Le Grand-Cachot 1
- Cghearth Experience Hotels 1
- Ch. R. & Cie 1
- Chad Valley Books 2
- Chalford 4
- Challenger Publications 21
- Chambers 1
- Chambre De Commerce De Grenoble 1
- Champlin Fighter Museum Press 2
- Chancellor Press 7
- Changi Publication Co. 1
- Channel 4 2
- Chantry Press 1
- Chapel Hill 2
- Chapman & Hall 36
- Chapman & Hall Ltd 9
- Chapmans 1
- Chappell & Co. Ltd. 1
- Charles Birchall 1
- Charles E. Merrill Publishing Co. 1
- Charles Farlow 1
- Charles Griffin & Co. Ltd. 4
- Charles Griffin & Company Limited 1
- Charles H. Kelly 5
- Charles Herissey 1
- Charles Knight 2
- Charles Scribner's Sons 35
- Charles Skilton 6
- Charles Skilton Ltd. 12
- Charles Taylor 1
- Charles Tilt 2
- Charles Wilson (booksellers) Limited 1
- Charlotte James 1
- Charta 15
- Chartwell Books Inc. 4
- Chartwell-Bratt 2
- Chas. J. Clark 1
- Chatford House Press Ltd. 5
- Chatham Publishing 11
- Chatto & Windus 84
- Chatto & Windus Ltd 3
- Chatto, Boyd & Oliver 1
- Chatto, Boyd and Oliver 1
- Chelsea Green Publishing Company 2
- Chelsea House Publishers 4
- Chelsea Publishing Co. 3
- Chene 2
- Cheona Publications 1
- Chepstow Rural District Council 1
- Chepstow Town Council 1
- Cheshire And Wirral Ornithological Society 1
- Cheshire Community Council 1
- Cheshire County Council 1
- Chester County Historical Society 1
- Chester House Press 1
- Chesterfield Borough Council 1
- Chevprime 2
- Chicago 2