| Tachau | CZ Tachov | ||
| Tapiau | PL Tapiawa | RUS Gwardejsk | |
| Taplacken | RUS Talpaki | ||
| Tarnau | PL Tarnow | ||
| Tarvis | I Tarvisio | ||
| Taschow | CZ Tasov | ||
| Tauroggen | RUS Taurage | ||
| Taus | CZ Domazlice | ||
| Telschen | LT Telsiai | ||
| Teltsch | CZ Telc | ||
| Tepl | CZ Tepla | ||
| Teplitz-Schönau | CZ Teplice-Sanov | ||
| Teschen | CZ Tesin | ||
| Tetschen | CZ Decin | ||
| Theresiendorf | CS Terezov | ||
| Theresienstadt | CZ Terezin | ||
| Theusing | PL Touzim | ||
| Thorn | PL Torun | ||
| Tibein | I Duino | ||
| Tiege | PL Tuja | ||
| Tillowitz | PL Tiluwice | ||
| Tilsit | LT Sovietskas | RUS Sovietsk / Sowjetsk | |
| Timmertau | RUS Konstantinowka | ||
| Tlumatschau | CZ Tlumatsov | ||
| Tolmein | I Tolmino | ||
| Topoltschau | CS Topolciany | ||
| Tost | PL Toszek | ||
| Totzau | CZ Tocov | ||
| Trachenberg | PL Zmigrod | ||
| Trakehnen | RUS Jasnaja Poljana | ||
| Trebitsch | CZ Trebic | ||
| Trebnitz | CZ Tebenice | ||
| Trebnitz | PL Trzebnica | ||
| Trentschin | CS Trencin | H Trencsen | |
| Treptow | PL Trzebiatow | ||
| Treptow-Badstübertor | PL Trzebiatow-Mokre | ||
| Treustädt | PL Zduny | ||
| Triebusch | PL Trzebosz | ||
| Trockenberg | PL Gora | ||
| Troppau | CZ Opava | ||
| Trutenau | PL Trutnowy | ||
| Trüffer | SLO Lasko | ||
| Tscherman | SK Cermany | ||
| Tschernowitz | R Cernauti | BUK Chernovcy | |
| Tüchern | SLO Teharje | ||
| Türchau | PL Turow | ||
| Tütz | PL Ticzno | ||
| Tullnitz | CZ Dolenice | ||
| Tulpeningen | RUS Saretschnoje | ||
| Turas | CZ Turany | ||
| Turnau | CS Turnov | ||
| Turoscheln (ab 1938-07-16 Mittenheide) |
PL Turosl | ||
| Tusset | CS Stozec | ||
| Tworkau | PL Tworkow | ||
| Tyrnau | CS Trnava | ||
| Uggehnen | RUS Matrossowo | ||
| Uhwala | H Ofalu | ||
| Ungarisch Altenburg | H Mosonmagyarovar | ||
| Ungarisch Brod | SK Uhersky Brod | ||
| Unterdrauburg | SLO Dravograd | ||
| Unter-Gerspitz | CZ Dolni Herspice | ||
| Unter-Sandau | CZ Dolni Zandov | ||
| Unterschönborn | UKR | ||
| Unter-Tannowitz | CZ Dolni Dujanovice | ||
| Unter-Wisternitz | CZ Dolni Vestonice | ||
| Urspitz | CZ Cvrcovice | ||
| Urwegen | R Girbova | ||
| Vettern | CZ Vetri | ||
| Vietz | PL Witnica | ||
| Vigaun | SLO Begunje | ||
| Voitelsbrunn | CZ Sedlec | ||
| Volmar | LV Valmiera |