| TXT | France | 1 |
| Tyndale House | | 15 |
| Typewriter Pub | Etats-Unis | 2 |
| Typo | France | 28 |
| U.S. Naval Institute Press | Etats-Unis | 1 |
| Ubik-Art | France | 2 |
| Udir | France | 1 |
| Udon entertainment | | 19 |
| Uei shiang | Chine | 2 |
| UGA | France | 4 |
| UGE | France | 4 |
| Ugo Guanda | Italie | 5 |
| Ugo mursia editore | Italie | 2 |
| Uitgeverij Q | Pays-Bas | 3 |
| Ulisse | France | 8 |
| Ulisseia | Portugal | 1 |
| Ullmann | | 8 |
| Ullstein | France | 47 |
| Ulmann | France | 3 |
| Ulmer | France | 133 |
| Ulmer | France | 0 |
| Ulthar | France | 30 |
| üLtim | | 5 |
| Ultimes Griots | Côte d\'Ivoire | 1 |
| Ultimo Press | Australie | 2 |
| UltraLetters | | 6 |
| Ulysse | | 10 |
| Ulysse (Guides) | | 6 |
| Ulysses Press | | 2 |
| Umami | France | 1 |
| Umbriel | Espagne | 10 |
| Umuzi | Afrique du Sud | 5 |
| Un Autre Reg'Art | France | 3 |
| Un chat la nuit | France | 4 |
| Un Dimanche Après-Midi | France | 2 |
| Un Fil à la Page | France | 5 |
| Un monde différent | France | 57 |
| Un Phare dans la Nuit | France | 5 |
| Un Sourire de toi et j'quitte ma mère | France | 1 |
| Un, Deux... Quatre | France | 1 |
| Unayok | | 1 |
| Unbound | Afghanistan | 19 |
| Underground | | 40 |
| Undertow Publications | | 6 |
| Underwood Books | | 2 |
| Une autre voix | Suisse | 1 |
| Une Heure en Été | France | 2 |
| Une île... des auteurs | France | 1 |
| Une oeuvre du domaine public | France | 175 |
| Unes | France | 18 |
| Unesco | France | 8 |
| Unicité | France | 18 |
| Unicorn Press | Angleterre | 1 |
| Unicursal | | 4 |
| Union Générale | France | 12 |
| Union Square & Co. | Etats-Unis | 5 |
| Unique Héritage | France | 57 |
| Univers partagés | France | 7 |
| Universale Economica Feltrinelli | France | 29 |
| Universitaires | | 4 |
| Universitaires de Dijon (EUD) | France | 13 |
| universitaires Européennes (EUE) | | 2 |
| Université de Lorraine | | 3 |
| Université de Mons | Belgique | 1 |
| Université des Femmes | Belgique | 1 |
| Université Libre de Bruxelles | France | 16 |
| University of Akron Press | | 1 |
| University of Alaska Press | France | 2 |
| University of Alberta Press | Canada | 2 |
| University of Arizona Press | France | 7 |
| University of Arkansas Press | Etats-Unis | 2 |
| University of Calgary Press | Canada | 2 |
| University of California Press | France | 25 |
| University of Georgia Press | | 1 |
| University of Hawai'i Press | Etats-Unis | 4 |
| University of Illinois | Etats-Unis | 2 |
| University of Iowa | | 2 |
| University of KwaZulu Natal Press | Afrique du Sud | 2 |
| University of Michigan Press | | 2 |
| University of Minnesota Press | Etats-Unis | 11 |
| University of Nebraska Press | | 6 |
| University of Oklahoma Press | | 6 |
| University of Queensland Press | Australie | 6 |
| University of South Carolina Press | France | 2 |
| University of Texas Press | | 17 |
| University of Toronto Press | | 6 |
| University of Washington Press | Etats-Unis | 5 |
| University of Wisconsin Press | Etats-Unis | 5 |
| University Press of Kansas | Etats-Unis | 3 |
| University press of Mississipi | Etats-Unis | 2 |
| University Press of New England | | 7 |
| Uno | | 1 |
| Unseelie | France | 3 |
| Unverscience / de la Martinière | | 3 |
| Unwin | France | 8 |
| UP' Magasine | France | 0 |
| UPblisher | France | 17 |
| Upper Rubber Boot (URB) | | 1 |
| Urano | | 5 |
| Urban China | France | 57 |
