Publishers
- Canongate Publishing Limited 1
- Cape Times 1
- Capital Transport 32
- Capitol Publishing Co. 1
- Caradon District Council 1
- Cardiff Council 1
- Cardiff University 1
- Cardox Limited 1
- Carey Press 1
- Carl Fromme 1
- Carl Hanser 1
- Carl Winter 1
- Carlton Books Limited 2
- Carlton Press Inc. 1
- Carmarthan Journal 1
- Carmarthenshire County Council 1
- Carnegie Publishing Ltd. 2
- Carnival 1
- Carole Green Publishing 1
- Carp Fishing News Ltd 1
- Carreg Gwalch 1
- Cartech 1
- Carwal Publications, Ltd. 1
- Casemate 1
- Casemate Publishers 3
- Cassell 14
- Cassell & Co. 13
- Cassell & Co. Ltd. 22
- Cassell & Company Limited 36
- Cassell & Company Ltd 33
- Cassell Illustrated 1
- Cassell Petter & Galpin 6
- Cassell Publishers Ltd. 1
- Cassell, Petter And Galpin 1
- Cassell, Petter, Galpin & Co. 1
- Castell Brothers 4
- Castell Brothers Ltd. 5
- Casterman 11
- Castle Books 1
- Castlemead Publications 1
- Castlereagh Press 1
- Catalpa Press Ltd 1
- Caxton Editions 3
- Caxton Publishing Co. 1
- Caxton Publishing Company Limited 1
- CCS Books 1
- Cecil Palmer 4
- Cef Books 1
- Centaur Press Ltd 1
- Centennial Publishing 1
- Center Of Military History United States Army 1
- Central Books Limited 3
- Centre For Alternative Technology 1
- Centre For North-West Regional Studies 1
- Century 4
- Century Benham 1
- Century Hutchinson Ltd. 2
- Century Publishing 2
- Cerberus 1
- Cetre Et Fondation Le Grand-Cachot 1
- Ch. R. & Cie 1
- Chad Valley Books 1
- Chadworth Limited 1
- Chaffcutter Books 3
- Chalford 3
- Challenger Publications 12
- Chambre De Commerce De Grenoble 1
- Chameleon Publishing 1
- Champlin Fighter Museum Press 1
- Chancellor Press 7
- Channel 4 2
- Chantry Press 1
- Chapel Hill 1
- Chapman & Hall 24
- Chapman & Hall Ltd 10
- Chapman & Hall/Crc 6
- Chapmans 1
- Chappell Music Ltd. 1
- Charles Baldwyn 1
- Charles Birchall 1
- Charles E. Tuttle Company 1
- Charles Farlow 1
- Charles Griffin & Co. Ltd. 2
- Charles Griffin & Company 1
- Charles H. Kelly 1
- Charles Knight 2
- Charles Knight & Co. Ltd. 1
- Charles Scribner's Sons 7
- Charles Skilton 3
- Charles Skilton Ltd. 11
- Charles Taylor 2
- Charles Thurnam & Sons 1
- Charles Tilt 1
- Charles Wilson (booksellers) Limited 1
- Charta 12
- Chartwell Books Inc. 1
- Chartwell-Bratt 1
- Chas. J. Clark 1
- Chatford House Press Ltd. 1
- Chatham Publishing 8