Kalabitocoris MILLER, 1941 Þ Harpactorini, Harpactorinae
Kalonotocoris MILLER, 1941 Þ Harpactorini, Harpactorinae
Kalshovenia MILLER, 1954 Þ Reduviinae
Kaniama SCHOUTEDEN, 1952 Þ Harpactorini, Harpactorinae
Karenocoris MILLER, 1954 Þ Dicrotelini, Harpactorinae
Karlacoris MALIPATIL, 1988 Þ Dicrotelini, Harpactorinae
Kasaka SCHOUTEDEN, 1952 Þ Ectrichodiinae
Katanga SCHOUTEDEN, 1903 Þ Ectrichodiinae
Kayanocoris MILLER, 1954 Þ Reduviinae
Keiserocoris MILLER, 1957 Þ Harpactorini, Harpactorinae
Kekenboschia VILLIERS, 1968 Þ Stenopodainae
Kelainocoris KORMILEV, 1963 Þ Phymatini, Phymatinae
Khafra DISTANT, 1902 Þ Reduviinae
Khafrana MILLER, 1957 Þ Reduviinae
Kibatia SCHOUTEDEN, 1932 Þ Harpactorini, Harpactorinae
Kibonotocoris MILLER, 1953 Þ Harpactorini, Harpactorinae
Kiskeyana WEIRAUCH & FORERO, 2007 Þ Saicinae
Kobacoris VILLIERS, 1969 Þ Reduviinae
Kodormus BARBER, 1930 Þ Stenopodainae
Kokadocoris MILLER, 1958 Þ Stenopodainae
Komodocoris MILLER, 1954 Þ Harpactorini, Harpactorinae
Kopsteinia MILLER, 1954 Þ Reduviinae
Korinchocoris MILLER, 1941 Þ Reduviinae
Kormilevida VAN DOESBURG, 1997 Þ Macrocephalini, Phymatinae
Kumaonocoris MILLER, 1952 Þ Stenopodainae