Publishers
- Wesleyan Methodist Sunday School Union 1
- Wessex Books 1
- West Col Productions 1
- West Midland Bird Club 2
- West Monmouth School 2
- West, Newman & Co. 1
- Westarp Wissenschaften 1
- Westbury Publishing 2
- Westerham Press 1
- Western Australian Museum 1
- Western Canadian Distributors Ltd. 1
- Western Daily Press 1
- Western Mail 4
- Western Mail And Echo Limited 3
- Westerners Publications Ltd. 2
- Westerway Books 1
- Westholme Publishing 3
- Westminster Press Ltd. 1
- Westmorland Gazette 3
- Wharncliffe Books 5
- Wharncliffe Publishing Limited 2
- Wheaton 2
- Wheaton Of Exeter 1
- Wheelhouse Books 1
- Wheldon & Wesley 1
- Whitbread & Co. Ltd. 1
- Whitcombe and Tombs 1
- White Boar Publishing 1
- White Lion Publishers Limited 5
- White Mane Books 1
- White Mouse 2
- Whitechapel Art Gallery 1
- Whiting & Co. 2
- Whitman Publishing Company 11
- Whitney Library Of Design 1
- 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 15
- Wildearth 2
- Wilding & Son Ltd. 6
- Wildwood House Ltd. 2
- Wiley 5
- Wiley-Academy 1
- Wiley-Interscience 4
- 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 and Sons 9
- 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
- William Edwin Rudge 1
- William Graham 1
- William Heinemann 53
- William Heinemann Ltd. 45
- William Hunter 1
- William J. Hay 1
- William Jackson (Books) Ltd. 1
- William Kidd & Sons Ltd. 1
- William Kimber 24
- William Kimber & Co. Limited 1
- William Kimberley Limited 1
- William Lewis 6
- William Lewis(Printers)Ltd. 2
- William Macintosh 2
- William Mackenzie 2
- William Morrow 1
- William Morrow & Company 2
- William Morrow & Company Inc 3
- William P. Nimmo 2
- William Pamplin 1
- William Phillips 1
- William Pickering 4
- William Pollard 1
- William Pollard & Co. Limited 1
- William R. Jenkins Company 1
- William Rees 1
- William Reeves 1
- William Rice 2
- William Satchell & Co. 1
- William Sessions 1
- William Tegg 1
- William Whyte 1
- Williams and Norgate 1
- Williams and Norgate Ltd. 1
- Willow Books 1
- Willow Bookscreek Press 1
- Willow Publishing 1