Publishers
- World International Publisher 3
- World International Publishing Limited. 3
- World Scientific 3
- World Ship Society 6
- World's Work 4
- World's Work Ltd. 15
- Wrens Park Publishing 4
- Wright 1
- Wright's Coal Tar Soap 1
- Wrightway Publishing Limited 1
- Wroughton History Group 5
- Wydawnictwo Morskie 1
- Wye Angling Publications 1
- Wykeham Publications 1
- Xpress Publising 9
- Y. Lolfa 1
- Y. Lolfa Cyf. 1
- Yale Centre For British Art 1
- Yale University Press 32
- Yarrow And Company 1
- Yearling Books 1
- Yeoman Publishing 1
- Yerba Seca Publications 1
- Yorkshire Archaeological Society 1
- Yorkshire Naturalists' union 2
- Young World Productions 4
- Youth Book Club Ltd. 1
- Ystalyfera 1
- Zenith Press 1
- Ziji Publishing 2
- Zoological Society Of London 9