Publishers
- Crosby Lockwood 1
- Crosby Lockwood and Son 3
- Crown Publishers 1
- Crown Publishers Inc. 1
- Crowood 3
- Crowswing Books 3
- Crystal Palace Foundation 1
- Cupples & Leon Company 2
- Cushing-Malloy Inc 1
- Cuthell And Martin 2
- Cwmni Cymraeg Foyle 1
- Cwmni Urdd Gobaith Cymru 1
- Cwmni Y. Wasg Eglwysig Gymreig 1
- Cyhoeddedig Gan D. O'Brien Owen 1
- Cyhoeddiadau Barddas 3
- Cyhoeddiadau Mei 1
- Cylch Llyfryddol Caerdydd 1
- Cymdeithas Alawon Gwerin Cymru 1
- Cymric Federation Press 1
- D. & W. Gibbs Ltd. 1
- D. Appleton & Company 2
- D. Appleton And Company 2
- D. Bogue 1
- D. Bradford Barton 16
- D. Brown & Sons Limited 24
- D. Mortimore 1
- D. Reidel Publishing Company 9
- D. Van Nostrand 3
- D. Van Nostrand Company 1
- D. Wyllie & Son 1
- D.A.P. Distributed Art Publishers Inc. 1
- D.Brown & Sons Ltd. 1
- D.C. Thomson & Co Ltd. 82
- D.K. & M.N. Sandford 1
- D.S. Brewer 1
- D.V. Publications Ltd. 10
- Da Capo Press 2
- Daily Express 279
- Daily Graphic 1
- Daily Herald 2
- Daily Mail 3
- Daily Mirror 13
- Daily Mirror Books 1
- Daily Post 1
- Daily Sketch & Sunday Graphic Ltd. 5
- Daimler-Benz 1
- Dakini Media Ltd 1
- Daldy, Isbister & Co. 1
- Dalesman Books 2
- Dalesman Publishing Company Ltd. 3
- Dalton Watson 10
- Dalton Watson Fine Books 3
- Dana Estes & Company 1
- Daniel O'Connor 3
- Danny Books 1
- Dargaud 1
- Dartmoor Preservation Association 1
- Darton & Co. 2
- Darton And Clark 2
- Darton And Harvey 2
- Darton And Hodge 1
- David & Charles 162
- David Allen & Sons Ltd 1
- David Bennett Books 3
- David Bennett Books Ltd. 3
- David Bogue 2
- David Bridge & Co. Ltd. 1
- David Bull Publishing 1
- David C. Cook Publishing Co. 1
- David Fickling Books 4
- David G. Styles 2
- David Leader 1
- David McKay 2
- David McKay Company 7
- David Nutt 14
- David Ogilvy 1
- David Schutte 9
- David St John Thomas 7
- David Welch 1
- David Weston Publications 1
- Davies And Co. 1
- Davis-Poynter 1
- Dawson 1
- Dawson Publications 1
- Dawsons Of Pall Mall 1
- Day & Son 1
- DBI Books Inc. 1
- De Belgische Duivensport 2
- De Walburg Pers 1
- De Wolfe-Fiske & Co. 1
- Dean 5
- Dean & Son 5
- Dean & Son Ltd. 116
- Dean Batchelor Publications 1
- Dean's Rag Book Co. Ltd. 21
- Dean's Rag Books 2
- Debecourt 1
- Debrett's Peerage Ltd. 1
- Defiant Publications 1
- Delacorte Press 3