 Harvill Press Australia | 1 | 1995 |
 Harvill Secker UK | 13 | 2000 - 2017 |
| Haska Books UK | 1 | 2007 |
 Haskell House Publishers USA | 3 | 1971 - 1975 |
 Hasselbach Denmark | 1 | 1945 |
| Hasselbalch Denmark | 1 | 1966 |
| Hastings House USA | 1 | 1966 |
 Hatier France | 1 | 1993 |
 Háttér Hungary | 2 | 1993 - 2006 |
| Haus Publishing UK | 2 | 2005 - 2008 |
 Hauschild Germany | 2 | 1959 - 2004 |
| Havel A Seifert Czechoslovakia | 1 | 1927 |
| Hawk Books UK | 1 | 1998 |
| Haworth Press USA | 1 | 2003 |
| Hawthorn Books USA | 5 | 1973 - 1980 |
| Hay House USA | 7 | 2004 - 2013 |
| Hayden Book Company USA | 2 | 1979 - 1982 |
| Hayes Publishing USA | 6 | 2001 - 2016 |
| Hayes Usborne International | 1 | 1979 |
| Hayfield School Publishing UK | 1 | 1998 |
 Haymon Austria | 2 | 2017 |
| Hayne Germany | 1 | 2020 |
| Haynes UK | 49 | 1973 - 2018 |
| Haytian Bureau Of Emigration USA | 1 | 1861 |
| Hazelden Foundation USA | 1 | 1991 |
| Hazleton Publishing UK | 10 | 1981 - 1998 |
| HBI Watson Guptill USA | 1 | 2000 |
 HCL Netherlands | 15 | 2003 - 2022 |
| Head Heritage Press UK | 1 | 2023 |
| Head Of Zeus UK | 18 | 2013 - 2022 |
| Headline UK | 172 | 1987 - 2021 |
| Headline USA | 1 | 2014 |
| Headline Feature UK | 6 | 1991 - 2000 |
| Headline Review UK | 20 | 2005 - 2024 |
| Headpress UK | 9 | 2003 - 2018 |
| Healdsburg Arts Council USA | 1 | 1998 |
| Health And Strength, Ltd. UK | 1 | 1908 |
| Hearst Books USA | 2 | 2010 - 2012 |
| Heathfield Railway Publications UK | 1 | 2009 |
| Hebel Germany | 6 | 1971 - 1985 |
| Heckners Germany | 1 | 1974 |
| Hector Kelly Limited UK | 1 | 1954 |
| Heddon Publishing UK | 1 | 2018 |
| Heel Germany | 11 | 2001 - 2013 |
 Heel Verlag Czech Republic | 1 | 2014 |
| Heidelberg Publishers, Inc. USA | 1 | 1974 |
 Heidruns Förlag Sweden | 1 | 2011 |
| Heimburger House Publishing Company USA | 1 | 2000 |
| Heimbygda Sweden | 22 | 1935 - 1969 |
| Heimdal France | 3 | 1982 - 2003 |
| Heimeran Germany | 2 | 1978 - 1979 |
| Heinemann UK | 29 | 1949 - 2003 |
| Heinemann / Octopus UK | 2 | 1980 - 1983 |
| Heinemann Educational USA | 1 | 1999 |
| Heinemann Educational Books International | 2 | 1977 - 1990 |
| Heinemann Educational Books UK | 1 | 1970 |
| Heinemann New Windmills UK | 1 | 1990 |
| Heinemann Young Books UK | 1 | 1998 |
| Heinrich Albert Verlag In Der Edition Erdmann Germany | 1 | 2000 |
| Heinrich Hanau Publications UK | 1 | 1974 |
| Heinrich Kapp Verlag Germany | 1 | 1972 |
| Heinrich Pöppinghaus Verlag Germany | 1 | 1972 |
| Heinrich Rulf, Wiedenbrück Germany | 1 | 1948 |
| Heinrich Schwab Verlag Yoga Edition Schopfheim Germany | 1 | |
| Heinz Peter Germany | 2 | 1966 |
| Heirloom Library UK | 2 | 1949 |
| Helén Lilled Sweden | 1 | 1997 |
| Helgums Hembygdsförening Sweden | 1 | 1984 |
| Helicon UK | 1 | 1995 |
 Helikon Bulgaria | 1 | |
| Helikon Hungary | 1 | 1989 |
| Heliocentric Books Australia | 3 | 1984 - 1987 |
| Helion UK | 12 | 2004 - 2022 |
| Hellebore Books UK | 1 | 2021 |
| Helmut Rauschenbusch Verlag Germany | 1 | 1949 |
| Helpan Denmark | 1 | 2011 |
 Helsinki-kirjat Finland | 1 | 2010 |
| Helter Skelter UK | 18 | 1998 - 2016 |
| Hemlock Books UK | 2 | 2012 - 2014 |
| Hemma Verlag Germany | 1 | |
| Hemmets Journal / Serieförlaget Sweden | 7 | 1990 - 1992 |
| Hemmets Journal AB Sweden | 5 | 1972 - 1984 |
| Hemmets Journal AB-Bokförlaget Sweden | 2 | 1974 - 1976 |
 Hemmingsen Publishing Canada | 8 | 2011 - 2025 |
| Hemus Bulgaria | 1 | 1946 |
 Henchman House Unknown Country | 1 | 2011 |
| Henri Laurens France | 1 | 1932 |
| Henri Nannen Verlag Germany | 1 | 1958 |
| Henri Veyrier France | 4 | 1976 - 1985 |
| Henry Altemus Company USA | 1 | 1896 |
| Henry Burmester Verlag Germany | 1 | |
| Henry Frowde UK | 1 | 1911 |
| Henry Frowde Canada | 1 | 1910 |
| Henry H. Halley USA | 1 | 1944 |
| Henry Holt UK | 2 | 1986 - 1988 |
| Henry Holt And Company USA | 40 | 1926 - 2022 |
| Henry Regnery Company USA | 2 | 1952 - 1969 |
| Henry Sweet UK | 1 | 1884 |
| Henschel Germany | 2 | 1956 - 1997 |
| HenschelHaus USA | 2 | 2018 |
| Henschelverlag Kunst Und Gesellschaft East Germany | 6 | 1970 - 1983 |
| Henselowsky Boschmann Germany | 1 | 2002 |
| Hera Verlag Wilhelmshaven Germany | 8 | 1950 - 1952 |
| Herald Books USA | 5 | 1968 - 1983 |
| Herb Lester Associates UK | 1 | 2014 |
| Herbert Jenkins UK | 8 | 1947 - 1967 |
| Herbert Reichner Austria | 1 | 1938 |
| Herbert Von Halem Verlag Germany | 1 | 2009 |
| Herbig Germany | 5 | 1977 - 2009 |
| Hercules UK | 1 | 2004 |
 Hércules Spain | 1 | 2005 |
| Herder Germany | 17 | 1942 - 2015 |
| Herder Book Center USA | 1 | 1964 |
| Heritage Conservation And Recreation Service, US Departmet Of The Interior USA | 1 | 1980 |
| Heritage Press USA | 2 | 1944 - 1977 |
| Heritage Publications UK | 1 | 1981 |
| Hermann Böhlaus Nachfolger, Weimar Germany | 1 | 1925 |
| Hermann Borgsmüller Verlag, Münster I. W. Germany | 2 | |
| Hermann Engl Verlag Germany | 1 | 1994 |
| Hermann Mendelssohn Germany | 1 | 1863 |
| Hermann Schaffstein Verlag, Dortmund Germany | 1 | 1977 |
| Hermann Schaffstein Verlag, Köln Germany | 4 | 1950 - 1972 |
| Hermann Schroedel Germany | 2 | 1961 - 1972 |
| Hermes Bulgaria | 2 | 2014 - 2020 |
| Hermes House UK | 8 | 1999 - 2010 |
| Hermes House USA | 1 | 1997 |
| Hermes Press USA | 2 | 2005 - 2008 |
| Hernando Spain | 1 | 1953 |
| Herold Verlag, Stuttgart Germany | 2 | 1948 - 1978 |
| Heron / Edito-Service S.A. Geneva UK | 3 | |
| Heros-Verlag G.m.b.H., Bayreuth Germany | 3 | 1954 - 1955 |
| Hesperos Verlag Germany | 1 | 1944 |
| Hesperus Press UK | 2 | 1984 - 2012 |
| Hesse & Becker Verlag Germany | 1 | |
| Het Goede Boek Netherlands | 2 | 1960 - 1970 |
| Het Parool Netherlands | 10 | 2003 - 2005 |
| Hewlett Packard Germany | 2 | 1995 |
| Hexam And Gridley Limited UK | 1 | 1989 |
| Heyday Books USA | 4 | 2005 - 2023 |
| Heyday Publishing Co. UK | 1 | 1986 |
| Heyne Germany | 1033 | 1959 - 2024 |
| Heyne Biographien Germany | 5 | 1975 - 1991 |
| Heyne Discothek Germany | 1 | 1981 |
| Heyne Encore Germany | 1 | 2017 |
| Heyne Ex Libris Germany | 1 | 1978 |
| Heyne Filmbibliotek Germany | 3 | 1979 - 1991 |
| Heyne Galeria Edition Germany | 1 | 2011 |
| Heyne Hardcore Germany | 18 | 2006 - 2022 |
| Heyne Jugend Taschenbücher Germany | 1 | 1977 |
| Heyne Original Germany | 1 | 2006 |
| Heyne Sachbuch Germany | 2 | 1995 - 2001 |
| HFL Germany | 2 | 1962 - 1974 |
| HH Books Germany | 1 | 2022 |
| Hi-Lite USA | 1 | 2015 |
| Hi-Q UK | 1 | 1999 |
| Hidalgo France | 1 | 1989 |
| Hidalgo / Fixot France | 2 | 1990 |
| Hidden Brook Press Canada | 2 | 2014 - 2016 |
| High Hill Press UK | 1 | 1977 |
| High Risk Books International | 1 | 1995 |
| Highbury Entertainment Ltd UK | 1 | 2004 |
| Highdown UK | 1 | 2007 |
| Highgate Publications (Beverley) UK | 2 | 1987 - 1988 |
| Highland House USA | 1 | 1988 |
| Hilfsverein Aussig e.V. München Germany | 1 | 1983 |
| Hillhurst-Sunnyside Community Association Canada | 1 | 1978 |
| Hillman USA | 10 | 1959 - 1961 |
| Hillman Publications USA | 1 | 1949 |
| Hillman-MacFadden USA | 2 | 1961 |
| Hillsborough Community Development Trust UK | 1 | 1995 |
| Hillside UK | 2 | 2003 - 2005 |
| Hinkler Books UK | 2 | 2005 - 2020 |
| Hinkler Books Australia | 1 | 2004 |
 Hinoki Shoten Japan | 1 | 1968 |
| Hippo UK | 4 | 1981 - 1994 |
| Hippo Bokförlag Sweden | 1 | 2016 |
| Hippocrene Books USA | 2 | 1983 - 1994 |
| Hippy Comix, Inc. USA | 1 | 2006 |
| Hipway Press USA | 2 | 2002 - 2003 |
| Hiro Production International Austria | 1 | 1962 |
| Hirsh Publications USA | 1 | 1974 |
| Hirst Publishing UK | 1 | 2012 |
| Hirundo-Bücher Germany | 11 | 1963 - 1964 |
| Histoire & Collections France | 4 | 1998 - 2014 |
| Historic Newspapers UK | 1 | 2021 |
| Historical Archive Press USA | 1 | 1994 |
| Historical Publishing Company USA | 1 | 1894 |
| Historisch Centrum Leeuwarden Netherlands | 1 | 2018 |
| Historiska Media Sweden | 10 | 1997 - 2022 |
| History Today UK | 1 | 1953 |
| History West USA | 7 | 1981 |
| HJ Publications UK | 1 | 1984 |
| Hjalmarson & Högberg Sweden | 1 | 1999 |
| Hjalmarson & Högberg Bokförlag Sweden | 1 | 2014 |
| HJB Verlag Germany | 1 | 1996 |
 Hjemmets Bokforlag Norway | 1 | 1991 |
| HMSO UK | 108 | 1939 - 1996 |
| HMSO Canada | 3 | 1946 |
| HMSO And Longmans UK | 2 | 1957 - 1964 |
| Hobbies Limited UK | 1 | 1965 |