| Whiskey Creek Press | Etats-Unis | 7 |
| Whitcombe and Tombs | Nouvelle-Zélande | 1 |
| White Lion Publishing | Angleterre | 11 |
| White Press | Allemagne | 1 |
| White Sadhu Publishers | | 1 |
| White Star | France | 58 |
| White Sun Press | Etats-Unis | 2 |
| White's Books | Etats-Unis | 4 |
| WhitePearl | France | 1 |
| Whitman Publishing | Etats-Unis | 1 |
| Whitman-France | France | 4 |
| Why Not | France | 5 |
| Wilco | France | 1 |
| Wild Child Publishing | Etats-Unis | 4 |
| Wild Nature Press | Angleterre | 2 |
| Wilde City Press | Etats-Unis | 2 |
| Wilder Publications | France | 4 |
| Wildfire | Angleterre | 0 |
| Wildproject | France | 39 |
| Wildside Press | Etats-Unis | 15 |
| Wildstorm | Etats-Unis | 14 |
| Wiley | France | 30 |
| William Blake & Co. | France | 7 |
| William Collins | Écosse | 42 |
| William Heinemann | Angleterre | 29 |
| William Morrow & Company | Etats-Unis | 396 |
| Williams | France | 2 |
| Wilton Press | Angleterre | 4 |
| Wimzi | | 1 |
| Windmill books | Angleterre | 29 |
| Wings Books | Etats-Unis | 4 |
| Winioux | | 8 |
| Winterfields | | 1 |
| Wisdom Publications | Etats-Unis | 1 |
| Wisehouse | | 5 |
| Witch Way Publishing | Etats-Unis | 2 |
| Witches' Almanac | | 1 |
| Wizard Books | Angleterre | 6 |
| Wizards of the Coast | France | 28 |
| WMG Publishing | | 10 |
| Wolf publishing | Angleterre | 1 |
| Wolfhound Press | Irlande | 8 |
| Wombat | France | 37 |
| Women’s Prize for Fiction | Etats-Unis | 1 |
| Wooden Books | | 3 |
| Word Horde | Etats-Unis | 1 |
| Word West | | 3 |
| WordFire Press | | 5 |
| Wordiz | France | 2 |
| Wordsworth | Angleterre | 301 |
| Workman | Etats-Unis | 19 |
| World Crisis Crew | France | 1 |
| World Editions | | 3 |
| World Weaver Press | | 5 |
| Worldmaker Media | Etats-Unis | 8 |
| Worth Press | | 2 |
| Wow | | 4 |
| WPG Uitgevers BE | France | 3 |
| Wraithmarked Creative, LLC | Etats-Unis | 11 |
| Wrecking Ball Press | Angleterre | 0 |
| Wren & Rook | Angleterre | 8 |
| Write bloody | Etats-Unis | 3 |
| Writer's Digest Books | | 8 |
| WSFA Press | Etats-Unis | 2 |
| WSOY | Finlande | 2 |
| Wunderraum | Allemagne | 1 |
| Wycliffe & Ligue pour la Lecture de la Bible | France | 1 |
| Wydawnictwo MAG | Pologne | 6 |
| Wyrm | Etats-Unis | 3 |
| Wytherngate Press | Etats-Unis | 4 |
| X-Arrow | France | 7 |
| Xarpa Books | Espagne | 1 |
| Xavier Barral | France | 11 |
| Xéléniel | France | 1 |
| Xenia | France | 19 |
| Xérographes | France | 1 |
| Xiao Pan | France | 48 |
| XO | France | 720 |
| XO / 12 bis | France | 4 |
| XO / Nathan | France | 2 |
| Xordica | France | 1 |
| Xxi | France | 3 |
| XYZ | Canada | 125 |
| Y Lolfa | Pays de Galles | 4 |
| Yago | France | 8 |
| YakaBooks | France | 16 |
| Yale University Press | Etats-Unis | 51 |
| Yan Lei Press | Angleterre | 2 |
| Yaoi Generation | Etats-Unis | 5 |
| Yapi Kredi Yayinlari | Turquie | 11 |
| YB | France | 3 |
| YBY | France | 58 |
| Yé-kri | Tunisie | 1 |
| Yearling | Angleterre | 61 |
| Yediot sfarim | Israël | 1 |
| Yellow Concept | France | 5 |
| Yellow Jersey Press | Angleterre | 3 |
| Yellow Kite | Angleterre | 7 |
| Yellow Now | Belgique | 5 |
| Yen Press | Etats-Unis | 340 |
