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- Hachette Book Group USA
- Hackett Publishing Company
- Happy House part of Darakwon Press
- Hamish Hamilton currently part of Penguin Books (UK)
- Harcourt Trade Publishers: originally Harcourt Brace & Company (1919), then Harcourt, Brace & World, Inc. (1960), and Harcourt Brace Jovanovich (HBJ, 1970), now part of Harcourt Education
- Harcourt Assessment, previously The Psychological Corporation, now part of Harcourt Education
- Harlequin Enterprises Ltd
- Harper & Brothers became Harper & Row
- Harper & Row also now part of HarperCollins
- HarperCollins Publishers
- HarperPrism an imprint of HarperCollins
- HarperTrophy an imprint of HarperCollins
- Harry N. Abrams, Inc.
- Harvard University Press
- Harvest House
- Harvill Press at Random House
- Hawthorne Books
- Hay House
- Haynes Manuals (UK)
- Heinemann (book publisher) an imprint of the Harcourt Education division of Reed Elsevier
- Herbert Jenkins
- Heyday Books
- HMSO
- Hodder & Stoughton
- Hodder Headline
- Hogarth Press
- Holland Park Press
- Holt McDougal
- Hoover Institution Press
- Horizon Scientific Press (UK)
- Houghton Mifflin
- House of Anansi Press
- The House of Murky Depths (UK)
- Howell-North Books, defunct US publisher of history/Americana
- Humana Press
- Hutchinson
- Hyperion (publisher)
Read more about this topic: List Of English-language Book Publishing Companies