| Jaculistilus† Zhang, Ren & Yao, 2018 (Mimarachnidae†) |
| Jagannata Distant, 1906 (Issidae) |
| Jamaha Gnezdilov & O'Brien, 2008 (Nogodinidae) |
| Jamaicastes Kirkaldy, 1900 (Fulgoridae) |
| Jamella Kirkaldy, 1906 (Flatidae) |
| Janssensia Lallemand, 1950 (Ricaniidae) |
| Jantaritambia† Szwedo, 2000 (Tropiduchidae) |
| Japetus Stål, 1863 (Fulgoridae) |
| Jassidaeus Fieber, 1866 (Delphacidae) |
| Jatoba† Poinar, Vega & Stroinski, 2020 (Nogodinidae) |
| Javesella Fennah, 1963 (Delphacidae) |
| Jeromicanus Stroinski, 2020 (Ricaniidae) |
| Jinlinus Ding, 2006 (Delphacidae) |
| Jivatma Distant, 1906 (Lophopidae) |
| Johannesburgia Distant, 1907 (Tropiduchidae) |
| Jonabenna Hoch, 2013 (Cixiidae) |
| Juba Jacobi, 1901 (Flatidae) |
| Jubisentis† Zhang, Ren & Yao, 2019 (Jubisentidae†) |
| Jugoda Melichar, 1915 (Lophopidae) |
| Jugodina Schumacher, 1915 (Delphacidae) |
| Juniperthia O'Brien, 1985 (Achilidae) |
