Publishers
- Wells Gardner, Darton & Co. 30
- Wells Gardner, Darton & Co. Limited 11
- Wells Gardner, Darton & Co. Ltd. 37
- Wells Gardner, Darton And Co 2
- Welsh Arts Council 1
- Welsh Bibliographical Society 1
- Welsh Council 1
- Welsh Health Estates 1
- Welsh Railways Research Circle 1
- Wendy Webb Books 1
- Werner Laurie 12
- Wesleyan Conference Office 3
- Wessex Books 1
- West Col Productions 1
- West Essex Archaeological Group 1
- West Midland Bird Club 2
- West Monmouth School 2
- Westarp Wissenschaften 1
- Westbury Publishing 1
- Western Australian Museum 1
- Western Canadian Distributors Ltd. 1
- Western Mail 4
- Western Mail And Echo Limited 2
- Westerners Publications Ltd. 2
- Westholme Publishing 1
- Westmorland Gazette 3
- Wharncliffe Books 4
- Wharncliffe Publishing Limited 2
- Wheaton 1
- Wheaton Of Exeter 1
- Wheelhouse Books 1
- Wheldon & Wesley 2
- Whitbread & Co. Ltd. 1
- Whitcombe and Tombs 1
- White Boar Publishing 1
- White Lion Publishers 1
- White Lion Publishers Limited 5
- White Mane Books 2
- White Mouse 2
- White Owl 1
- Whitechapel Art Gallery 1
- Whiting & Co. 1
- Whitman Publishing Company 8
- Whitney Library Of Design 1
- Whittaker & Co. 4
- Whittet Books 2
- Whittles Publishing 2
- Whsmith 1
- Wicwas Press 2
- Wild Dog Press 1
- Wild Swan Publications 16
- Wildearth 2
- Wilding & Son Ltd. 6
- Wildwood House Ltd. 2
- Wiley 3
- Wiley-Academy 1
- Wiley-Blackwell 1
- Wiley-Interscience 2
- Wilhelm Ernst & Sohn 2
- William and Robert Chambers 4
- William Andrews & Co. 3
- William Bailey 1
- William Blackwood 1
- William Blackwood & Sons Ltd. 1
- William Blackwood and Sons 6
- William Brendon And Son 1
- William Briggs 1
- William Brown 1
- William Clowes & Sons Ltd. 4
- William Collins 15
- William Collins Sons & Co. Ltd. 7
- William Darton And Son 1
- William Edwin Rudge 1
- William Graham 1
- William Heinemann 50
- William Heinemann Ltd. 34
- William Hunter 1
- William J. Hay 1
- William Jackson (Books) Ltd. 1
- William Kidd & Sons Ltd. 1
- William Kimber 18
- 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 2
- William Morrow & Company 1
- William Morrow & Company Inc 1
- William P. Nimmo 1
- William Pamplin 1
- William Pickering 4
- William Pollard 1
- William Pollard & Co. Limited 1
- William R. Jenkins Company 1
- William Rees 1
- William Reeves 1
- William Satchell & Co. 1
- William Sessions 1