| Titania | Espagne | 11 |
| Tite Fée | | 4 |
| Title Books | | 2 |
| Tituli | | 3 |
| TJ Éditions | Belgique | 1 |
| TKO | Etats-Unis | 11 |
| TME | France | 0 |
| 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 |
| Tornade | France | 8 |
| Torquere Press | | 1 |
| Torticolis et Frères | Suisse | 6 |
| Toth | | 11 |
| Touchstone Books | Etats-Unis | 39 |
| Tourbillon | France | 211 |
| Touret | France | 18 |
| Tourisme & Découvertes | | 1 |
| Tournesol | France | 10 |
| Tournez la page | France | 2 |
| Tournon | France | 23 |
| Tous lire | France | 1 |
| tout l'univers | France | 1 |
| TPub | | 3 |
| Trabucaire | France | 4 |
| Tractors & Heels LLC | | 1 |
| Trafalgar Square | France | 1 |
| Trajectoire | France | 45 |
| Tramp Press | Irlande | 3 |
| Trampoline | | 3 |
| Transaction Publishers | Etats-Unis | 1 |
| Transatlantic Press | France | 7 |
| Transatlantiques | France | 1 |
| Transboréal | France | 142 |
| Transcontinental | France | 14 |
| Transignum | France | 1 |
| Transimaginaires | | 4 |
| Transit | France | 14 |
| Transworld | Irlande | 4 |
| Transworld digital | France | 54 |
| Trapeze | | 30 |
| Trash | | 17 |
| Traugott Bautz | Allemagne | 1 |
| Travelin' Hoosier Books | Inde | 2 |
| Traverse | | 6 |
| Tre Lune | Italie | 1 |
| TRE60 | Italie | 1 |
| Trécarré | France | 52 |
| Tredition | | 8 |
| Treffendel | | 1 |
| Trèfle à quatre feuilles | Canada | 2 |
| Treize étrange | France | 53 |
| Treizième Lune | France | 2 |
| Trepidatio | Etats-Unis | 4 |
| Treville | France | 2 |
| Triad | Etats-Unis | 2 |
| Triades | | 0 |
| Triangle postals | | 2 |
| Triarchy Press | Angleterre | 1 |
| Triartis | France | 13 |
| TRIAS | Allemagne | 4 |
| Tribew | | 1 |
| Tribord | France | 3 |
| Trilogie Éditions | France | 9 |
| Trinity University Press | Etats-Unis | 3 |
| Trinôme | France | 5 |
| Trinquette Publishing | Etats-Unis | 6 |
| Triptyque | France | 52 |
| Triskel | France | 7 |
| Triskele Books | Angleterre | 3 |
| Tristram | France | 79 |
| Triumph | Etats-Unis | 1 |
| Trois | France | 4 |
| Trois Petits Points (Huleux) | | 12 |
| Trois.L. | | 3 |
