- Kleidocerys ericae (Horváth, 1908)
- Kleidocerys nubilus (Distant, 1883)
- Kleidocerys privignus (Horváth, 1894)
- Kleidocerys resedae (Panzer, 1797)
- Kleidocerys resedae resedae (Panzer, 1797)
- Kleidocerys truncatulus (Walker, 1872)
- Knightocapsus Wagner, 1963
- Kohnometopus fraxini Yasunaga, 2012
- Kohnometopus yangi (C.S. Lin, 2005)
- Kokeshia esakii Miyamoto, 1960
- Kokeshia hsiaoi Ren & Zheng, 1992
- Kokeshia martensi Štys, 1985
- Kokeshia similis Štys, 1985
- Kokeshia xiei Rédei, Ren & Bu, 2012
- Kokeshia zhengi Rédei, Ren & Bu, 2012
- Koreocoris bicoloratus Cho & Kwon, 2008
- Ktenocoris Wagner, 1954
- Kulichoderes iranicus (Štys, 1970)
- Kundakimuka pallipes (Miyamoto, 1965)
- Labidocoris elegans Mayr, 1865
- Labidocoris insignis Distant, 1883
- Labidocoris pectoralis (Stål, 1863)
- Labopidea Uhler, 1877
- Labops bami Kulik, 1979
- Labops burmeisteri Stål, 1858
- Labops kerzhneri Vinokurov, 2010
- Labops nivchorum Kerzhner, 1988
- Labops sahlbergii (Fallén, 1829)
- Labops setosus Reuter, 1891
- Laccocoris bouvieri Poisson, 1936
- Laccocoris limigenus Stål, 1866
- Laccotrephes (Laccotrephes) chinensis (Hoffmann, 1925)
- Laccotrephes (Laccotrephes) fabricii fabricii Stål, 1868
- Laccotrephes (Laccotrephes) fabricii Stål, 1868
- Laccotrephes (Laccotrephes) griseus (Guérin-Méneville, 1835)
- Laccotrephes (Laccotrephes) grossus (Fabricius, 1787)
- Laccotrephes (Laccotrephes) japonensis Scott, 1874
- Laccotrephes (Laccotrephes) maculatus (Fabricius, 1775)
- Laccotrephes (Laccotrephes) pfeiferiae (Ferrari, 1888)
- Laccotrephes (Laccotrephes) robustus Stål, 1871
- Laccotrephes (Laccotrephes) simulatus Montandon, 1913
- Laccotrephes Stål, 1866
- Lactistes falcolipes Hsiao, 1977
- Lactistes incertus Signoret, 1881
- Lactistes obesipes Signoret, 1879
- Lactistes truncatoserratus Signoret, 1879
- Lactistes vericulatus Schiødte, 1848
- Laemocorella Linnavuori, 1964
- Laemocoris dispar Schmidt, 1939
- Laemocoris divisus Linnavuori, 1964