Publishers
- William And George North 1
- William and Robert Chambers 4
- William Andrews & Co. 3
- William Bailey 1
- William Blackwood 2
- William Blackwood & Sons Ltd. 2
- William Blackwood and Sons 10
- William Brendon And Son 1
- William Briggs 1
- William Brown 1
- William Clowes & Sons Ltd. 2
- William Collins 13
- William Collins Sons & Co. Ltd. 9
- William Edwin Rudge 1
- William Graham 1
- William Heinemann 59
- William Heinemann Ltd. 48
- William Hunter 1
- William J. Hay 1
- William Kidd & Sons Ltd. 1
- William Kimber 17
- William Lewis 6
- William Lewis(Printers)Ltd. 2
- William Macintosh 2
- William Mackenzie 1
- William Miller 1
- William Morrow 2
- William Morrow & Company 3
- William Morrow & Company Inc 2
- William P. Nimmo 1
- William Pamplin 1
- William Phillips 1
- William Pickering 5
- William Pollard 1
- William Pollard & Co. Limited 2
- William R. Jenkins Company 1
- William Rees 1
- William Reeves 1
- William Rice 1
- William Satchell & Co. 1
- William Sessions 1
- William Smith 1
- William Tegg 1
- William Whyte 1
- Williams & Norgate Ltd. 1
- Williams and Norgate 1
- Williams and Norgate Ltd. 1
- Willow Bookscreek Press 1
- Wills & Hepworth Ltd. 88
- Wilo-Brain 1
- Wilson & Phillips 1
- Wilson Books 1
- Wilton 65 1
- Wiltshire Record Society 1
- Winchester Press 2
- Windmill Books 1
- Windrow & Greene 13
- Windward 2
- Wingham Press 1
- Wisdom Tree 1
- Withers Publishing 1
- Wm. Byles 1
- Wm. Collins Sons & Co. Ltd. 7
- Wnd Books 1
- Wolfhound Press 1
- Wolters-Noordhoff 1
- Wonderdog Publications 1
- Woodall and Venables 1
- Woodenboat Publications 1
- Woodland Publishing 1
- Woodlands Press 1
- Woodpecker Publications 1
- Woolhope Naturalists' Field Club 1
- Worcestershire Archaeological Society 1
- Wordens Of Cornwall Ltd. 1
- Wordsworth Editions Ltd. 1
- Workers' Educational Association 1
- World Distributors 1
- World Distributors (manchester) Ltd 4
- World Distributors Ltd. 30
- World Health Organization 1
- World International 2
- World International Publisher 4
- World International Publishing Limited. 2
- World Scientific 3
- World Ship Society 3
- World Working Group On Birds Of Prey And Owls 1
- World's Work 8
- World's Work Ltd. 14
- Worldlist 1
- Worley Publications 1
- Wrens Park Publishing 3
- Wright 1
- Wright's Coal Tar Soap 1
- Wrightway Publishing Limited 1
- Writersworld 1
- Wroughton History Group 5
- Wydawnictwo Bm Graniczkowska 1
- Wydawnictwo Morskie 1
- Wydawnictwo Stratus 1