Ibaka Distant, 1910, Genus – synonym of Carbula Stål, 1865, Genus
Iberolygus Kim, Goula & Jung, 2019, Genus
Ibiaris Horváth & Reuter in Horváth, 1901c – synonym of Acrotelus Reuter, 1885, Genus
Idatiella China, 1926d, Genus – synonym of Sejanus Distant, 1910, Genus
Idatius Distant, 1910c, Genus – synonym of Sejanus Distant, 1910, Genus
Idiotrephes Lundblad, 1933, Genus
Ildefonsus Distant, 1911, Genus
Ilerda Stål, 1865, Genus – homonym of Lerida Karsch, 1895, Genus
Iliastus Gistel, 1848, Genus – synonym of Lethocerus Mayr, 1853, Genus
Ilyotrephes Stål, 1854, Genus – synonym of Hydrocyrius Spinola, 1850, Genus
Incitatus Distant, 1908, Genus – synonym of Martinina Schouteden, 1907, Genus
Indatractus Linnavuori, 1975, Genus
Indoelum Kirkaldy, 1906a, Genus – synonym of Stenotus Jakovlev, 1877, Genus
Iocoris P. Zhao, Z.H. Luo & Cai, 2009, Genus
Ioglena Stål, 1873, Genus – synonym of Poecilocoris Dallas, 1848, Genus
Iostethus Stål, 1873, Genus – synonym of Cantao Amyot & Serville, 1843, Genus
Iphiarusa Breddin, 1904, Genus
Iphicrates Distant, 1903, Genus
Irochrotus Amyot & Serville, 1843, Genus
Isabellina Distant, 1904a, Genus – misspelled name of Isabel Kirkaldy, 1902, Genus
Isachisme Kirkaldy, 1904, Genus – synonym of Gomesius Distant, 1903, Genus
Ischnobaenella Wygodzinsky, 1966, Genus
Ischnocoris Fieber, 1860, Genus
Ischnodemus Fieber, 1837, Genus
Ischnodemus: Provancher, 1886, Genus – invalid name of Peritrechus Fieber, 1860, Genus
Ischnomorphus Hidaka, 1961, Genus – synonym of Pirkimerus Distant, 1903, Genus
Ischnonyctes Stål, 1874, Genus
Ischnopeza Fieber, 1860, Genus
Ischnorhynchinae Stål, 1872, Subfamilia
Ischnorhynchus Fieber, 1860, Genus – synonym of Kleidocerys Stephens, 1829, Genus
Ischnoscelicoris Reuter, 1886, Genus
Ischnoscelis Reuter, 1880c, Genus – homonym of Ischnoscelicoris Reuter, 1886, Genus
Ischnotarsus Fieber, 1860, Genus – synonym of Dieuches Dohrn, 1860, Genus
Iskenderia Kiritshenko, 1952, Genus
Isometopidea Poppius, 1913, Genus
Isometopiellus Akingbohungbe, 1996, Genus
Isometopus Fieber, 1860, Genus
Itacorides Miyamoto, 1965, Genus
Iterduca Distant, 1918, Genus – synonym of Metacanthus A. Costa, 1843, Genus
Itupona Wagner, 1957j, Genus – synonym of Voruchiella Poppius, 1912, Genus
Ituribius Bergroth, 1926, Genus – synonym of Anoplocnemis Stål, 1873, Genus
Iwasakia Matsumura, 1913, Genus – synonym of Dasynus Burmeister, 1834, Genus
Ix Bergroth, 1916, Genus – synonym of Fingulus Distant, 1904, Genus
Ixia Kerzhner, 1972, Genus – synonym of Metasalis Lee, 1971, Genus