 Wezäta Förlag Sweden | 3 | 1942 - 1982 |
 WH Allen UK | 2 | 2016 - 2021 |
 Whalen Book Works USA | 1 | 2023 |
| Wharncliffe Books UK | 1 | 2009 |
| Wharncliffe Local History UK | 1 | 2016 |
| Wharncliffe Publishing UK | 1 | 2001 |
| Wheelhouse Publishers USA | 1 | 2021 |
 Whelan Publications Canada | 1 | 1990 |
| Whigmaleerie Publishing UK | 1 | 1987 |
| Whispering Eagle Press USA | 1 | |
 Whitcombe And Tombs New Zealand | 1 | 1974 |
 Whitcombe And Tombs Limited Australia | 1 | 1936 |
| White Circle Canada | 6 | 1944 - 1950 |
| White Cliffs Media USA | 1 | 2000 |
| White Ladder Press UK | 1 | 2004 |
| White Lion UK | 21 | 1972 - 2018 |
| White Owl UK | 2 | 2020 - 2024 |
| White Rabbit UK | 6 | 2020 - 2022 |
| White River USA | 1 | 2014 |
| White River Publications USA | 1 | 2011 |
| White Star UK | 1 | 2019 |
| White Star Kids USA | 1 | 2023 |
 White Star Publishing Italy | 1 | 2009 |
| White Wolf Publishing USA | 5 | 1994 - 2001 |
| Whitecap Canada | 1 | 2001 |
| Whitecap Books Canada | 2 | 1995 - 1997 |
| Whitehead, Morris & Co. UK | 1 | 1911 |
| Whitfield Press USA | 1 | 1998 |
| Whiting & Wheaton UK | 3 | 1966 |
| Whiting And Wheaton UK | 1 | 1967 |
| Whitman Books USA | 10 | 1967 - 1979 |
| Whitman Golden Limited Canada | 2 | 1973 - 1978 |
| Whitman Publishing Company USA | 54 | 1934 - 1976 |
| Whitman Publishing Company UK | 1 | |
| Whitman Publishing Company Canada | 1 | 1971 |
| Whitman Publishing Division USA | 6 | 1968 - 1977 |
| Whitman Publishing, LLC USA | 2 | 2015 - 2018 |
| Whittaker & Co. UK | 1 | 1838 |
| Whittinghame House Publishing UK | 1 | 1992 |
| Whitworth Art Gallery, University Of Manchester UK | 1 | |
| Whizzard Press UK | 1 | 1979 |
| Wide-Eyed Editions UK | 1 | 2021 |
| Widewing USA | 1 | 1994 |
 Widukind-Verlag, Balve I. Westf. Germany | 2 | 1961 |
| Wienand Verlag Germany | 2 | 1993 |
| Wiener Boheme-Verlag Austria-Hungary | 1 | |
 Wiener Verlag Austria | 5 | 1947 - 1985 |
| Wiener Verlag Germany | 1 | 1998 |
| Wiken Sweden | 9 | 1990 - 1993 |
 Wilco / KPN Netherlands | 1 | 2017 |
| Wild And Woolley Australia | 2 | 1979 - 1982 |
| Wild Eye UK | 1 | 2016 |
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| Wildfire UK | 1 | 2022 |
| Wildside Press USA | 7 | 1999 - 2017 |
| Wiley Canada | 1 | 2010 |
| Wiley And Putnam USA | 1 | 1846 |
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| Wiley Publishing USA | 4 | 1998 - 2008 |
| Wilfred Laurier University Press Canada | 1 | 2019 |
| Wilfrid F. Simms UK | 1 | 1996 |
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| Wilhelm Hansen Muzik International | 1 | 1969 |
| Wilhelm Herbst Verlag Germany | 1 | 1987 |
| Wilhelm Heyne Verlag Germany | 41 | 1976 - 2024 |
| Wilhelm Langewiesche-Brandt, Ebenhausen Bei München Germany | 1 | 1941 |
| Wilhelm Limpert Verlag Germany | 3 | 1940 - 1961 |
| Wilhelmssons Bokförlag Sweden | 1 | 1959 |
| Willan Publishing UK | 1 | 2007 |
| Willems Netherlands | 1 | 2023 |
| Willi Hörber, Feuchtwangen Germany | 1 | 1992 |
| Willi Weismann Verlag München Germany | 1 | 1948 |
| William Blackwood And Sons UK | 2 | 1897 - 1909 |
| William Briggs Canada | 18 | 1890 - 1919 |
| William Clowes And Sons UK | 2 | 1901 |
| William Collins UK | 7 | 2017 - 2022 |
| William Collins & Sons UK | 1 | 1936 |
| WIlliam Collins Sons & Co UK | 20 | 1936 - 2015 |
| WIlliam Collins Sons & Co. UK | 2 | 1963 - 1974 |
| William Collins, Sons & Company UK | 1 | 1971 |
| William Heinemann UK | 38 | 1895 - 2021 |
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| William Hodge & Company UK | 1 | 1911 |
| William Kimber UK | 5 | 1961 - 1984 |
| William L. Allison USA | 1 | 1894 |
| William Laing UK | 1 | 1811 |
| William Morrow USA | 60 | 1974 - 2023 |
| William Morrow UK | 2 | 2010 - 2022 |
| William Morrow & Co USA | 4 | 1963 - 1991 |
| William Morrow And Company USA | 20 | 1946 - 1995 |
| William P. Nimmo UK | 1 | 1864 |
| William Reeves UK | 1 | 1929 |
| William Sloane Associates USA | 2 | 1948 - 1951 |
| William Smith UK | 1 | 1845 |
| William Wells Gardner UK | 1 | |
| Williams Publisher USA | 1 | 2000 |
| Williams, Hein & Company USA | 1 | 1981 |
| Willing & Williamson Canada | 2 | 1878 - 1880 |
| Willingham Press UK | 1 | 1989 |
| Willis P. Hazard USA | 1 | 1853 |
| Willow Books UK | 1 | 1987 |
| Willow Publishing UK | 1 | 1985 |
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| Willowisp Press USA | 1 | 1988 |
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| Wilson & Lafleur Canada | 1 | 1907 |
| Winbergs Bokprodution Sweden | 1 | 2011 |
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 Winchester Press Botswana | 1 | 1968 |
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| Windsor Publications Canada | 1 | 1983 |
| Windward UK | 1 | 1980 |
| Winema Publications USA | 1 | 1977 |
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| Wings Books USA | 4 | 1983 - 1992 |
| Winkies Castle Folk Museum UK | 1 | |
| Winkler Verlag, München Germany | 1 | |
| Winklers Verlag Germany | 5 | 1968 - 1976 |
| Wins-Holland Netherlands | 1 | |
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| Winthers Sweden | 2 | 1987 - 1988 |
| Wir-Verlag Walter Weller Germany | 1 | 1990 |
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| Wise Publications UK | 18 | 1973 - 2011 |
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| Witness Impulse UK | 1 | 2017 |
 Witsand Uitgevers Belgium | 1 | 2017 |
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| Wiz Books USA | 1 | 1969 |
| Wizard Books UK | 1 | 2002 |
| Wizards Of The Coast USA | 117 | 1999 - 2010 |
| WK Books USA | 2 | 2016 - 2022 |
| Wm. B. Eerdmans Publishing USA | 3 | 1976 - 1988 |
| Wm. Collins Sons And Co Ltd. UK | 1 | 1938 |
| Wm. J. Smith Music Co. Inc. USA | 1 | |
| Wm. W. Gaunts & Sons USA | 1 | 1993 |
| WND USA | 1 | 2012 |
| Woburn Press UK | 2 | 1974 - 1975 |
| Wolf Jobst Siedler Verlag - Berlin Germany | 1 | 1987 |
| Wolf Verlag Germany | 1 | 1971 |
| Wolfe UK | 2 | 1974 - 1976 |
| Wolfe Publishing UK | 1 | 1963 |
| Wolfgang Butt Verlag Germany | 2 | 1990 - 1991 |
| Wolfgang Krüger Verlag Germany | 5 | 1936 - 1959 |
| Wolfpack Publishing USA | 5 | 2020 - 2021 |
| Wonder Books USA | 7 | 1958 - 1976 |
| Woodford House UK | 1 | 1989 |
| Woodford Press USA | 1 | 1993 |
| Woodland Publishing UK | 1 | 2006 |
| Woodland Scenics USA | 1 | 1998 |
| Woodslane Australia | 1 | 2024 |
| Woodstock Books International | 1 | 2001 |
| Woodstock Books UK | 1 | 1989 |
| Wor Publications Group, Inc. USA | 1 | 1995 |
| Word And Action (Dorset) Ltd UK | 1 | 1982 |
| Word Audio Sweden | 1 | 2018 |
| Word Bibles Canada | 1 | 1993 |
| Wordclay USA | 1 | 2011 |
| Wordspin UK | 1 | 2003 |
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| Wordsworth Children's Classics UK | 2 | 1993 |
| Wordsworth Classics UK | 11 | 1992 - 2017 |
| Wordsworth Classics USA | 2 | 1998 - 1999 |
| Wordsworth Editions UK | 36 | 1985 - 2014 |
| Wordsworth Poetry Library UK | 2 | 1994 - 1995 |
| Word•Play Publications USA | 1 | 1998 |
| Workman Publishing USA | 17 | 1977 - 2023 |
 Workman Publishing China | 1 | 2010 |
| World & Whitman UK | 2 | 1979 - 1980 |
| World Almanac USA | 2 | 1990 |
| World Almanac Books USA | 1 | 1999 |
| World Almanac Library USA | 1 | 2001 |
| World Book Company USA | 3 | 1955 |
| World Books UK | 2 | 1967 - 1970 |
| World Distributors UK | 88 | 1950 - 1988 |
| World International Limited UK | 7 | 1990 - 1998 |
| World International Publishing Limited UK | 25 | 1980 - 1992 |
| World Publishing Co. USA | 8 | 1941 - 1970 |
| World Wide Web Publications USA | 1 | 2004 |
| World's Work UK | 1 | 1983 |
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| Worth Publishers USA | 1 | 1972 |
| WPRR USA | 1 | 1999 |
| Wrecking Ball Press UK | 2 | 1999 - 2000 |
| Wrens Park UK | 1 | 2000 |
| Wright & Brown Ltd UK | 1 | 1957 |
| Wright Publishing USA | 1 | 1970 |
| Writers Club Press USA | 1 | 2000 |