Publishers
- T. & A. Constable 2
- T. & A.D. Poyser 42
- T. & J. Manson 1
- T. Allman 2
- T. Buncle & Co. 4
- T. Cadell 3
- T. Cadell and W. Davies 4
- T. Carnan 1
- T. Egerton 2
- T. Fisher Unwin 20
- T. Fisher Unwin Ltd. 2
- T. Gee 1
- T. N. Foulis 1
- T. Nelson & Sons 28
- T. Nelson & Sons Ltd. 4
- T. Richards 1
- T. Stephenson & Sons Ltd. 3
- T. Tegg 1
- T. Vigurs 1
- T. Waller 1
- T. Werner Laurie Ltd. 6
- T. Wood 1
- T.C. & E.C. Jack 23
- T.C. & E.C. Jack Ltd. 14
- T.E. Schuster 2
- T.F.H. Kingdom 1
- T.F.H. Publications Ltd. 4
- T.F.H. Publications, Inc 2
- T.J. & J. Smith Limited 1
- T.J. Allman 1
- T.J. Manchee 1
- T.L. Ainsley 1
- T.N. Brushfield 1
- T.N. Foulis 4
- T.V. Boardman & Co. Ltd. 1
- T.V. Boardman & Company Limited 3
- T.V. Comic 1
- T.Y. Crowell & Co. 1
- TAB Books 2
- Tabb House 1
- Tag Publications 1
- Tamara Publications 1
- Tamarind Ltd. 1
- Tangent Books 1
- Tango Books 18
- Tarquin 1
- Taschen 8
- Tate Gallery 3
- Tate Publishing 2
- Tauris Academic Studies 2
- Tauris Parke Books 1
- Taylor & Francis 4
- Taylor and Francis 2
- Taylor Publishing Company 1
- Ted Smart 12
- Tees Archaeology 1
- Tegg, Wise & Tegg 1
- Tempest Associates Limited 1
- Templar Publishing 6
- Temple Lodge Publishing 2
- Temple Nostalgia 1
- Temple Press 10
- Temple Press Books 4
- Temple Press Limited 8
- Temple Smith 1
- Temple University Press 1
- Tempus 46
- Tempus Publishing Ltd 6
- Tempus Reparatum 1
- Tenorhart Ltd. 1
- Tentmaker Publications 1
- Teredo Books 3
- Terence Dalton Limited 10
- Tern Press 1
- Terry Underwood 3
- Th. Shroter 1
- Thames and Hudson 36
- Thames Publishing Co. 2
- The 8th Air Force Memorial Museum Foundation 1
- The Ace Publishing Company 10
- The Actinic Press 1
- The Adventurers Club 1
- The Advertiser Press Ltd. 1
- The Afan Valley Angling Club 1
- The Agricultural Research Corporation 1
- The Air League Of The British Empire 7
- The Albert F. Simpson Historical Research Centre 2
- The Albion Press 1
- The Aldine Publishing Co. Ltd. 2
- The Alexandra Publishing Co. 3
- The Alpine Club 1
- The Altaic Press 1
- The Alvis Register 1
- The Amaising Publishing House Ltd. 1
- The Amalgamated Press 74
- The Amalgamated Press Limited 8
- The American Alpine Club 1
- The American Federation of Arts 1
- The American Museum Of Natural History 1
- The American Ornithologists Union 2