Publishers
- Children's Universe 1
- Chilton Company 1
- Chiswick Press 6
- Chivers & Sons Ltd. 2
- Chorley & Pickersgill Ltd 1
- Chris Beetles Gallery 1
- Chris Beetles Ltd. 4
- Chris Sladden Books 1
- Chris Van Rensburg 2
- Christian Stoll 1
- Christie, Manson & Woods Ltd. 1
- Christoph Seigel 1
- Christopher Davies 11
- Christopher Forbes 1
- Christopher Helm 38
- Christophers 2
- Chronica Botanica Company 1
- Chronicle Books 6
- Chronosports 5
- Chronosports Gsn Publishing 1
- Chrysalis Children's Books 1
- Church Missionary Society 1
- Church Of England Zenana Missionary Society 1
- Cicada Books 1
- Cicerone Press 3
- Cinebook Ltd 1
- Cirencester Newspaper Company 1
- Citta Di Torino 1
- City Of Birmingham 1
- City Of Portsmouth 1
- City Of Worcester 1
- Claremont Books 1
- Clarendon Press 14
- Clarke Printing 1
- Clarkes New Press 1
- Clarkson N. Potter Inc. 1
- Classic 4
- Classic Publications 3
- Claude Lefrancq Editeur 2
- Claye, Brown & Claye 1
- Clearview 1
- Clematis Press Limited 2
- Clement Ingleby 1
- Clifton Books 1
- Climber's Club 2
- Clive Holloway Books 1
- Clowes And Sons 1
- Clwydian-Press 1
- Clyard Novella Limited 1
- Clymer 2
- CMG Publishing 2
- Co-Operative Printing Sociaty Limited 1
- Co-operative Wholesale Society 2
- Coastal Publications 1
- Cobden-Sanderson 1
- Cobham Plc 1
- Cocorico 1
- Coles Publishing Company 1
- Colin Baxter Photography Ltd. 1
- Colin Buchanan And Partners 1
- Colin Smythe 1
- Collection Parthenope 1
- Collectors' Books 1
- College St. Centenary Committee 1
- Collier Macmillan Publishers 1
- Collins 606
- Collins & Brown 1
- Collins & Harvill 2
- Collins & Harvill Press 1
- Collins and Harvill 1
- Collins Clear-Type Press 111
- Collins Colour Camera Books 2
- Collins Lions 1
- Collins Voyager 1
- Collins Willow 5
- Colnaghi And Co. 1
- Colnet 2
- Colorgravure 1
- Colour Library Books 2
- Colour Library Direct 3
- Colourbox Publishing 1
- Colourpoint 1
- Colt Books 1
- Columbia University Press 5
- Combined Publishing 1
- Command And Staff College 1
- Commission Of Conservation Canada 1
- Commonwealth Agricultural Bureaux 1
- Commonwealth Scientific And Industrial Research Organization 1
- Commonwealth War Graves Commission 3
- Community Projects Centre 1
- Compaid Graphics 1
- Company Of Stationers 1
- Compassverlag 1
- Comstock Publishing Associates 5
- Comstock Publishing Company Inc. 1
- Concord Publications Co. 1
- Connaissance Du Rail 4
- Consejo Superior De Investigaciones Cintificas 1
- Conservation Press 1