Publishers
- Crecy Books 7
- Crecy Publishing Limited 10
- Creel Press 1
- Cresset Editions 1
- Cricket Books 1
- Croesor Junction Press 1
- Croil 1
- Croner Publications 1
- Croom Helm 7
- Croom Helm Ltd. 1
- Crosby Lockwood 1
- Crosby Lockwood and Son 3
- Crosby Lockwood And Son Ltd 1
- Cross And Jackman 1
- Crossprint 1
- Crown Publishers 2
- Crown Publishers Inc. 4
- Crowood 1
- Crowswing Books 2
- Crystal Palace Foundation 1
- Culture Et Civilisation, Bruxelles 1
- Cumberland & Westmorland Antiquarian & Archaeological Society 8
- Cupples & Leon Company 1
- Curwen Books 1
- Cushing-Malloy Inc 1
- Cwmbran Community Press Ltd. 1
- Cwmni Cymraeg Foyle 1
- Cwmni Urdd Gobaith Cymru 1
- Cwmni Y. Wasg Eglwysig Gymreig 1
- Cyhoeddedig Gan D. O'Brien Owen 1
- Cyhoeddiadau Barddas 2
- Cymric Federation Press 1
- D. Appleton & Company 2
- D. Appleton And Company 3
- D. Bradford Barton 19
- D. Brown & Sons Limited 26
- D. Mortimore 1
- D. Reidel Publishing Company 6
- D. Van Nostrand 1
- D. Van Nostrand Company 1
- D. Wyllie & Son 1
- D.C. Thomson & Co Ltd. 39
- D.V. Publications Ltd. 10
- D.W. Willoughby E.R. Oakley 1
- Da Capo Press 2
- Dahne Verlag 1
- Daily Express 239
- Daily Graphic 1
- Daily Herald 2
- Daily Mail 2
- Daily Mirror 8
- Daily Mirror Books 1
- Daily Post 1
- Daily Sketch & Sunday Graphic Ltd. 4
- Daimler-Benz 1
- Dakini Media Ltd 1
- Dalesman Books 2
- Dalesman Publishing Company Ltd. 2
- Dalrymple & Verdun Publishing 2
- Dalton Watson 10
- Dalton Watson Fine Books 2
- Dana Estes & Company 1
- Daniel O'Connor 1
- Darf Publishers Ltd 1
- Dartmoor Preservation Association 1
- Darton & Co. 3
- Darton And Clark 2
- Dave Watson Solutions Ltd 1
- David & Charles 109
- David Bangs 1
- David Bateman 1
- David Bogue 1
- David Bridge & Co. Ltd. 1
- David Bull Publishing 2
- David C. Cook Publishing Co. 1
- David Fickling Books 2
- David Harris 1
- David Martin 1
- David McKay 2
- David McKay Company 4
- David Nutt 14
- David Ogilvy 1
- David R. Godine 2
- David St John Thomas 7
- Davis-Poynter 1
- Dawne-Leigh Publications 1
- Dawson 1
- Dawson Publications 1
- Dawsons Of Pall Mall 1
- Day & Son 1
- DBI Books Inc. 1
- De Gruyter Open Ltd 1
- De Walburg Pers 1
- De Wolfe-Fiske & Co. 1
- Dean 4
- Dean & Son 7
- Dean & Son Ltd. 104
- Dean's Rag Book Co. Ltd. 18
- Dean's Rag Books 1
- Deans International Publishing 3