Publishers
- K. & R. Books Ltd. 1
- Kagero 1
- Kalmbach Books 1
- Kangaroo Press 1
- Karl Baedeker 1
- Katharine Parr 1
- Katherine Tegen Books 1
- Kattenkabinet 1
- Kaye & Ward 6
- Kaye & Ward Ltd. 20
- Kea Publishing 1
- Kegan Paul, Trench & Co. 1
- Kegan Paul, Trench, Trubner & Co. 3
- Kegan Paul, Trench, Trubner & Co. Ltd. 4
- Keith Reid 1
- Kelly's Directories Ltd. 2
- Kelsey Publishing Ltd 1
- Ken Publications 1
- Ken Trotman Publishing 1
- Kenilworth Press 1
- Kenneth Mason 1
- Kennys Bookshops & Art Galleries Ltd. 1
- Kensington Publishing Corp 1
- Kent & Co. 1
- Kent County Cricket Club 2
- Kent Fine Art, Inc. 1
- Kessinger Publishing 1
- Kestrel Books 22
- Kestrel Railway Books 6
- Kettlewell Transportation Information Trade Services 1
- Kevin Weldon And Associates Pty Ltd 1
- Key Porter Books 1
- Kibworth Books 1
- Kimberley's 1
- Kindredson Publishing 1
- King's College Cambridge 1
- Kingfisher 1
- Kingfisher Books 1
- Kingfisher Railway Productions 1
- Kingsmead Reprints 4
- Kitchener House-Publishers 1
- Kluwer Academic Publishers 6
- Knight Books 2
- Knowledge Publications 1
- Knowledge World 1
- Kober C.F. Spittlers Nachfolger 1
- Kodak 1
- Kodansha International Ltd. 2
- Koeltz Scientific Books 1
- Kogan Page 2
- Konemann 2
- Koninklijke Brill Nv 2
- Kookaburra Technical Publications 2
- Korda Developments Ltd 2
- Kosler Verlag Koln 1
- Kozdok 1
- Krause Publications 2
- Krb Publications 1
- Krieger Publishing Company 1
- Ktav Publishing House 1
- Kunsthalle Wurth 1
- Kunstsammlung Nordrhein-Westfalen 1
- Kurt Metzner 1
- L. & S. Rexon Of Southwold 1
- L. Mame 1
- L. Miller & Co. (Hackney) Ltd. 1
- L. Tallis 1
- L. Upcott Gill 3
- L. Wilding 1
- L.B. Fischer 1
- L.T.A Robinson 6
- L.T.A. Robinson Ltd. 12
- La Mille Miglia Editrice 1
- Ladybird Books 7
- Ladybird Books Ltd 1
- Lalit Kala Akademi 1
- Lamson Paragon Supply Company Ltd. 1
- Lancaster University Archaeological Unit 1
- Lancer Publishers & Distributors 2
- Landmark Publishing 12
- Laneman Publishing 3
- Langford Press 2
- Lannoo Publishers 1
- Lansdowne 2
- Lansdowne Press 1
- Lapridge Publications 3
- Larousse 2
- Last Gasp 1
- Latimer House 1
- Latimer House Limited 5
- Latimer House Ltd. 7
- Laurence and Bullen 2
- Laurence King Publishing 2
- Lawrence and Bullen 3
- Lawrence And Bullen Ltd. 2
- Lawrence Erlbaum 1
- Ldr Publications 1
- Le Centre National De La Recherche Scientifique 2
- Le Cherche Midi Editeur 1
- Le Lettere 1