Publishers
- Waterton Publishing 1
- Watmoughs Limited 1
- Watson-Gupthill Publications 1
- Wattle Books 1
- Watts & Co 1
- Wau Ecology Institute 1
- Waverley Book Company Ltd. 3
- Waverley Excursions Ltd 2
- Waxtel & Hasenauer 2
- Wayfarer Books 1
- Wayland Publishers 1
- Waynford Press Ltd. 2
- Wbooks 1
- Wea Bath Branch 1
- Weatherhill 1
- Weathervane Books 2
- Webb & Bower 9
- Weekly Reader Books 1
- Wegweiser 1
- Weidenfeld and Nicolson 44
- Weldon 1
- Wellington School 1
- Wells Gardner, Darton & Co. 41
- Wells Gardner, Darton & Co. Limited 12
- Wells Gardner, Darton & Co. Ltd. 35
- Wells Gardner, Darton And Co 2
- Welsh Arts Council 2
- Welsh Bibliographical Society 1
- Welsh Council 1
- Welsh Educational Publishing Co. 1
- Welsh Gazette 1
- Welsh Railways Research Circle 1
- Wendy Webb Books 1
- Werner Degener 1
- Werner Laurie 13
- Werner Shaw Ltd. 2
- Wesleyan Conference Office 2
- Wesleyan Methodist Sunday School Union 1
- Wessex Books 1
- West Col Productions 1
- West Cornwall Field Club 1
- West Midland Bird Club 2
- West Monmouth School 2
- West, Newman & Co. 1
- Westarp Wissenschaften 1
- Westbury Publishing 1
- Western Australian Museum 1
- Western Canadian Distributors Ltd. 1
- Western Daily Press 1
- Western Mail 4
- Western Mail And Echo Limited 4
- Westerners Publications Ltd. 2
- Westerway Books 1
- Westholme Publishing 3
- Westminster Press Ltd. 2
- Westmorland Gazette 3
- Wharncliffe Books 7
- Wharncliffe Publishing Limited 2
- Wheaton 1
- Wheaton Of Exeter 1
- Wheelhouse Books 1
- Wheldon & Wesley 1
- Whitbread & Co. Ltd. 1
- Whitcombe and Tombs 1
- White Boar Publishing 1
- White Cross School 1
- White Lion Books 1
- White Lion Publishers Limited 3
- White Mane Books 1
- White Mouse 2
- Whiting & Co. 2
- Whitman Publishing Company 11
- Whittaker & Co. 4
- Whittet Books 2
- Whittingehame House Publishing 1
- Whittles Publishing 3
- Whsmith 1
- Wicwas Press 1
- Wild Dog Press 1
- Wild Swan Publications 17
- Wildearth 2
- Wilding & Son Ltd. 6
- Wiley 5
- Wiley-Academy 1
- Wiley-Interscience 5
- Wilhelm Ernst & Sohn 2
- 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 16
- William Collins Sons & Co. Ltd. 8
- William Darton And Son 1