| Tabocasa Distant, 1906 (Fulgoridae) | Thioniamorpha Metcalf, 1938 (Issidae) |
| Tachorga Emeljanov, 1969 (Dictyopharidae) | Thioniella Metcalf, 1938 (Issidae) |
| Tachycixius Wagner, 1939 (Cixiidae) | Thiopara Gnezdilov, 2020 (Issidae) |
| Tagosodes Asche & Wilson, 1990 (Delphacidae) | Thiscia Stål, 1862 (- Fulgoroidea incertae sedis) |
| Tainosia† Szwedo & Stroinski, 2001 (Nogodinidae) | Thrasymemnon Fennah, 1965 (Delphacidae) |
| Talloisia Lallemand, 1959 (Fulgoridae) | Thriambus Fennah, 1964 (Delphacidae) |
| Taloka Distant, 1907 (Achilidae) | Thymbra Melichar, 1914 (Tropiduchidae) |
| Talopsus Medler, 1989 (Flatidae) | Thymobares Fennah, 1964 (Delphacidae) |
| Tambinia Stål, 1859 (Tropiduchidae) | Thymodelphax Asche, 1988 (Delphacidae) |
| Tangella Metcalf & Bruner, 1930 (Tropiduchidae) | Ticida Uhler, 1891 (Dictyopharidae) |
| Tangia Stål, 1859 (Tropiduchidae) | Tico Bahder & Bartlett, 2021 (Derbidae) |
| Tangidia Uhler, 1895 (Tropiduchidae) | Ticrania Emeljanov, 2006 (Dictyopharidae) |
| Tangina Melichar, 1903 (Achilidae) | Tigrahauda Oshanin, 1908 (Dictyopharidae) |
| Tangiopsis Uhler, 1901 (Tropiduchidae) | Tilimontia Emeljanov, 1969 (Dictyopharidae) |
| Tangyria Uhler, 1901 (Tropiduchidae) | Timonidia Ball & Hartzell, 1922 (Dictyopharidae) |
| Tanycranus Bartlett, 2010 (Delphacidae) | Tingissus Gnezdilov, 2003 (Issidae) |
| Taomma Emeljanov, 2007 (Cixiidae) | Tiriteana Myers, 1924 (Cixiidae) |
| Taosa Distant, 1906 (Dictyopharidae) | Tisia Dlabola, 1981 (Flatidae) |
| Taparella Medler, 1989 (Flatidae) | Togoda Melichar, 1906 (Tropiduchidae) |
| Tapirissus Gnezdilov, 2014 (Issidae) | Tomintus Stål, 1864 (Fulgoridae) |
| Taractellus Metcalf, 1948 (Achilidae) | Tonacatecutlius† Stroinski & Szwedo, 2000 (Nogodinidae) |
| Tarehylava Stroinski, 2021 (Ricaniidae) | Tonga Kirkaldy, 1900 (Nogodinidae) |
| Tarophagus Zimmerman, 1948 (Delphacidae) | Tormenis Medler, 1999 (Flatidae) |
| Tarundia Stål, 1859 (Ricaniidae) | Toropa Melichar, 1912 (Dictyopharidae) |
| Tatva Distant, 1906 (Issidae) | Torrebenna Hoch, 2013 (Cixiidae) |
| Tauropola Jacobi, 1944 (Tropiduchidae) | Toya Distant, 1906 (Delphacidae) |
| Tautoprosopa Emeljanov, 1978 (Issidae) | Toyalana Asche, 1988 (Delphacidae) |
| Tecmar Fennah, 1962 (Fulgoridae) | Toyoides Matsumura, 1935 (Delphacidae) |
| Tejasa Distant, 1906 (Flatidae) | Tragediana Campodonico, 2017 (Delphacidae) |
| Telmessodes Fennah, 1967 (Nogodinidae) | Traxanellus Caldwell, 1945 (Issidae) |
| Telmosias Fennah, 1967 (Nogodinidae) | Traxus Metcalf, 1923 (Issidae) |
| Temenites Fennah, 1965 (Delphacidae) | Trichodelphax Vilbaste, 1968 (Delphacidae) |
| Tempora Matsumura, 1914 (Derbidae) | Tricrosbia† Evans, 1971 (Surijokocixiidae†) |
| Tempsa Stål, 1866 (Issidae) | Trienopa Signoret, 1860 (Tropiduchidae) |
| Tempsarima Chang, Yang & Chen, 2020 (Issidae) | Trigava O'Brien, 1999 (Dictyopharidae) |
| Tenebricosus† He, Jiang & Szwedo, 2022 (Mimarachnidae†) | Trigonocranus Fieber, 1875 (Cixiidae) |
| Tenguella Matsumura, 1910 (Dictyopharidae) | Triloris Fennah, 1969 (Delphacidae) |
| Tenguna Matsumura, 1910 (Dictyopharidae) | Trimedia Fennah, 1944 (Dictyopharidae) |
| Teramnon Fennah, 1969 (Tropiduchidae) | Trirhacus Fieber, 1875 (Cixiidae) |
| Terauchiana Matsumura, 1915 (Delphacidae) | Trisephena Medler, 1990 (Flatidae) |
| Terthron Fennah, 1965 (Delphacidae) | Tritophania† Jacobi, 1938 (Tropiduchidae) |
| Terthronella Vilbaste, 1968 (Delphacidae) | Tropidocephala Stål, 1853 (Delphacidae) |
| Tetraceratium Muir, 1924 (Flatidae) | Tropiduchodes Schmidt, 1910 (Tropiduchidae) |
| Tetrafulgoria† Doweld, 2013 (Fulgoridiidae†) | Tropiduchus Stål, 1854 (Tropiduchidae) |
| Tetrasteira Muir, 1926 (Delphacidae) | Tropiphlepsia Muir, 1924 (Achilidae) |
| Tetrica Stål, 1866 (Issidae) | Truncatomeria Song & Liang, 2011 (Dictyopharidae) |
| Tetrichina Chang & Chen, 2020 (Issidae) | Trypetimorpha Costa, 1862 (Tropiduchidae) |
| Tetricissus Wang, Bourgoin & Zhang, 2017 (Issidae) | Trysanor Williams & Fennah, 1980 (Ricaniidae) |
| Tetricodes Fennah, 1956 (Issidae) | Tsaganema† Shcherbakov, 2007 (Perforissidae†) |
| Tetricodissus Wang, Bourgoin & Zhang, 2015 (Issidae) | Tsauria Koçak & Kemal, 2009 (Cixiidae) |
| Tettigometra Latreille, 1804 (Tettigometridae) | Tsaurus Yang, 1989 (Delphacidae) |
| Teutberga Jacobi, 1917 (Derbidae) | Tshurtshurnella Kusnezov, 1927 (Issidae) |
| Thabena Stål, 1866 (Issidae) | Tsingya Hoch & Bourgoin, 2014 (Meenoplidae) |
| Thabenoides Distant, 1916 (Issidae) | Tubilustrium Distant, 1916 (Caliscelidae) |
| Thabenula Gnezdilov, Soulier-Perkins & Bourgoin, 2011 (Issidae) | Tumidagena McDermott, 1952 (Delphacidae) |
| Thaiscelis Gnezdilov, 2015 (Caliscelidae) | Tupala Stroinski & Szwedo, 2015 (Dictyopharidae) |
| Thalassana Gnezdilov, 2016 (Issidae) | Turneriola China, 1923 (Tropiduchidae) |
| Thanatodictya Kirkaldy, 1906 (Dictyopharidae) | Tylacra Emeljanov, 2008 (Dictyopharidae) |
| Thaumantia Melichar, 1914 (Tropiduchidae) | Tylana Stål, 1861 (Nogodinidae) |
| Thaumastocladius† Cockerell & Sandhouse, 1921 (Nogodinidae) | Tylanira Ball, 1936 (Issidae) |
| Thaumatobenna Hoch, 2013 (Cixiidae) | Tyligma Löcker & Holzinger, 2020 (Cixiidae) |
| Thectoceps Williams, 1977 (Achilidae) | Typhlobrixia Synave, 1953 (Cixiidae) |
| Thessitus Walker, 1862 (Eurybrachidae) | Tyweponisia Bourgoin, 1997 (Meenoplidae) |
| Thionia Stål, 1859 (Issidae) |
