| Thélème | France | 374 |
| Thelès | France | 15 |
| Thélodys | France | 31 |
| Theloma | France | 5 |
| Théma press | France | 2 |
| Theme Park Press | Etats-Unis | 7 |
| Theoria | Italie | 1 |
| Thienemann | France | 17 |
| Thierry Magnier | France | 965 |
| Thierry Marchaisse | France | 14 |
| Thierry Sajat | France | 5 |
| Thierry Souccar | France | 108 |
| Think Book | France | 2 |
| Third | | 291 |
| Thirst | Etats-Unis | 1 |
| This is horror | | 1 |
| Thisa | France | 1 |
| Thomas | France | 27 |
| Thomas & Mercer | France | 127 |
| Thomas Dunne Books | Etats-Unis | 42 |
| Thomas Nelson | Etats-Unis | 60 |
| Thomas Rap | Pays-Bas | 1 |
| Thomson | France | 3 |
| Thorndike Press | | 3 |
| Thorntree Press | Etats-Unis | 3 |
| Thorson | | 3 |
| ThoT | France | 62 |
| Thought Catalog Books | | 20 |
| Three Hands Press | | 4 |
| Three Mountain Press | | 1 |
| Three Rivers Press | Etats-Unis | 30 |
| Three Rooms Press | | 2 |
| Thriller | France | 5 |
| Thunder Bay Press | | 12 |
| Thurston Howl Publications | Etats-Unis | 1 |
| Ti Embann ar skolioù | France | 1 |
| Tianjin renmin | Chine | 1 |
| Tianwen Kadokawa Animation & Comics | Japon | 1 |
| Tibert | | 24 |
| Tickled Pinkest | | 2 |
| Ticoklico | France | 4 |
| Tigre & Cie | | 17 |
| Tilted Axis Press | | 4 |
| Timas yayinlari | Turquie | 21 |
| Timber Press | Etats-Unis | 6 |
| Time Warner | Etats-Unis | 22 |
| Time-Life | France | 23 |
| Timée | France | 43 |
| Timelapse | | 5 |
| Timilenn | | 3 |
| Tin House | | 27 |
| Tinbad | France | 3 |
| Tinder Press | Angleterre | 36 |
| Tinta Blava | | 2 |
| Tiny Fox Press | Etats-Unis | 1 |
| Tiny Ghost Press | | 3 |
| Tiny Reparations Books | Etats-Unis | 1 |
| Tipaza | | 1 |
| Tipik | France | 10 |
| Tiquetonne | France | 1 |
| Tirage de têtes | France | 13 |
| Tirésias-Michel Reynaud | | 3 |
| Tirion | | 1 |
| Tishina | France | 6 |
| Titan Books | Angleterre | 392 |
| Titan Comics | | 61 |
| Titania | Espagne | 11 |
| Tite Fée | | 4 |
| Title Books | | 2 |
| Tituli | | 3 |
| TJ Éditions | Belgique | 1 |
| TKO | Etats-Unis | 11 |
| To the stars | | 2 |
| Toad Hall | Etats-Unis | 1 |
| Tobikawa Bunko | France | 16 |
| Todolibro | France | 1 |
| Tohubohu | | 30 |
| Tokebi | France | 167 |
| Tokuma Shoten | Japon | 28 |
| Tokyopop | Etats-Unis | 82 |
| Tolege | France | 2 |
| Tom Doherty Associates | France | 29 |
| Tom Pousse | France | 54 |
| Tom'poche | France | 1 |
| Tomawak | France | 4 |
| Tombooktu | Espagne | 1 |
| Tong Li | Chine | 24 |
| Tonkam | France | 1840 |
| Too Far Media | Etats-Unis | 1 |
| Toom | France | 1 |
| Top Cow | | 14 |
| Top Shelf | Etats-Unis | 25 |
| Topseller | Portugal | 47 |
| Topside Press | | 2 |
| Tor Books | Etats-Unis | 1043 |
| Tor Teen | Angleterre | 57 |
| Tor/Seven Seas | Etats-Unis | 18 |
| Tordotcom | | 43 |
| Tormark | | 1 |
| Tormont | France | 15 |
