| Jouvet et Cie | France | 1 |
| Jove Books | France | 32 |
| JS | France | 17 |
| JTB Publishing | France | 1 |
| Judena | | 2 |
| Jugant | France | 1 |
| Jules Labitte | France | 1 |
| Jules Taillandier | France | 9 |
| Julliard | France | 474 |
| Julliard/Pauvert | | 0 |
| Jumbo | Allemagne | 1 |
| Juné | Etats-Unis | 36 |
| June-Net | Japon | 3 |
| Jungle ! | France | 782 |
| Jungle / Nathan | | 7 |
| Juno Books | France | 4 |
| Juno Publishing | France | 1675 |
| Just Joshin | France | 14 |
| Just world | | 1 |
| Juste pour lire | France | 10 |
| Juven | France | 3 |
| Juventud | France | 3 |
| JYB-Aventures | | 4 |
| K&B | France | 18 |
| K'A | France | 1 |
| K'ty | | 1 |
| K-World | France | 2 |
| KA' | Tunisie | 2 |
| KaBOOM! | Etats-Unis | 11 |
| Kabuto | France | 79 |
| Kadaline | | 36 |
| Kadokawa Shoten | Japon | 142 |
| Kailash | France | 23 |
| Kaiôsha | Japon | 5 |
| Kaïros | France | 5 |
| Kairos | Canada | 14 |
| Kaiten Books | Etats-Unis | 1 |
| Kalandraka | | 2 |
| Kaléidoscope | France | 408 |
| Kalimat Group | | 1 |
| Kalopsia | Belgique | 5 |
| Kamarès | France | 1 |
| Kami | France | 103 |
| Kamiti | | 13 |
| Kamondo | France | 42 |
| Kampus | Canada | 23 |
| Kana | France | 3859 |
| Kandour | France | 1 |
| Kanjil | France | 1 |
| Kankô | France | 6 |
| Kantik | France | 25 |
| Kantoken | Belgique | 2 |
| Kapelusz Editora | Argentine | 1 |
| Kaph | | 1 |
| KAplume | France | 13 |
| Karibencyla | | 11 |
| Karibu | Allemagne | 2 |
| Kark | | 6 |
| Karl Müller | Allemagne | 5 |
| Karl Rauch | France | 1 |
| Karolus | France | 2 |
| Karthala | France | 38 |
| Kasai | France | 4 |
| Kata | Canada | 4 |
| Kate'Art | France | 3 |
| Katherine Tegen Books | Angleterre | 197 |
| Kathy Dawson Books | | 6 |
| Kawa | | 8 |
| Kawade Shobô Shinsha | Japon | 1 |
| Kaya | | 47 |
| Kazé | France | 1739 |
| Keesog | France | 1 |
| Kegedonce Press | Canada | 1 |
| Keit vimp bev | France | 20 |
| Kejhia | France | 6 |
| Kelach | France | 22 |
| Kelpies | Écosse | 1 |
| Keltia Graphic | | 8 |
| Kennedy and Boyd | Angleterre | 4 |
| Kennes | France | 488 |
| Kensington | Etats-Unis | 209 |
| Kensington Pudding | France | 1 |
| Kent State University Press | | 3 |
| Ker | Belgique | 42 |
| Kernpunkt Press | Etats-Unis | 1 |
| Kero | France | 166 |
| Keskin Color | Turquie | 1 |
| Kesselring | France | 7 |
| Kessinger | Etats-Unis | 20 |
| Ketina | Etats-Unis | 1 |
| Kettler Verlag | Allemagne | 1 |
| Ketty & Alexandre | France | 1 |
| KFD | France | 1 |
| Khaos project | France | 0 |
| Khaos project | France | 0 |
| Khéops | France | 1 |
| Ki-oon | France | 1891 |
| Kibu | Allemagne | 1 |
| Kiddy World Publishing | | 2 |
| Kids Can Press | Canada | 1 |
