| Species | Iassus abdominalis Fabricius, 1803
| | |
| Species | Iassus abietinus Fallén, 1806
| 1 | Subspecies |
| Species | Iassus acuminatus Fabricius, 1794
| | |
| Species | Iassus acutus Say, 1830
| | |
| Species | Iassus aequalis Walker, 1870
| | |
| Species | Iassus albidus Walker, 1851
| | |
| Species | Iassus albiger Germar, 1821
| | |
| Species | Iassus alni Schrank, 1801
| | |
| Species | Iassus alpinus Zetterstedt, 1828
| | |
| Species | Iassus angulifer Walker, 1869
| | |
| Species | Iassus anguliferus Walker, 1851
| | |
| Species | Iassus angustatus Osborn, 1934
| | |
| Species | Iassus annulipes Lucas, 1849 ⇒ Goniagnathus brevis
| | |
| Species | Iassus antarcticus Spinola, 1852
| | |
| Species | Iassus apicalis Spinola, 1852
| | |
| Species | Iassus argentatus Fabricius, 1794
| | |
| Species | Iassus argus Marshall, 1866
| | |
| Species | Iassus arisanus Matsumura, 1912
| | |
| Species | Iassus assimilis Fallén, 1806
| | |
| Species | Iassus atomarius Fabricius, 1794
| | |
| Species | Iassus atratus Fabricius, 1803
| | |
| Species | Iassus atrifrons Metcalf, 1946
| | |
| Species | Iassus attenuatus Germar, 1821
| | |
| Species | Iassus australis Walker, 1851
| | |
| Species | Iassus biguttatus Fabricius, 1794
| | |
| Species | Iassus bipustulatus Fabricius, 1794
| | |
| Species | Iassus bohemani Metcalf, 1966
| | |
| Species | Iassus brachypterus Boheman, 1847
| | |
| Species | Iassus brevis Herrich-Schäffer, 1835
| | |
| Species | Iassus brunneus Fabricius, 1794
| | |
| Species | Iassus buxtoni Osborn, 1934
| | |
| Species | Iassus calemia Walker, 1851
| | |
| Species | Iassus capensis Walker, 1851
| | |
| Species | Iassus cephalotes Walker, 1857
| | |
| Species | Iassus chilensis Spinola, 1852
| | |
| Species | Iassus chortophilus Walker, 1851
| | |
| Species | Iassus clathratus Blanchard, 1852
| | |
| Species | Iassus clitellarius Say, 1830
| | |
| Species | Iassus collinus Osborn, 1934
| | |
| Species | Iassus commutatus Fieber, 1872
| | |
| Species | Iassus consobrinus Curtis, 1833
| | |
| Species | Iassus conspersus Herrich-Schäffer, 1834
| | |
| Species | Iassus coriaceus Walker, 1869
| | |
| Species | Iassus corniculus Marshall, 1866
| | |
| Species | Iassus coronifer Marshall, 1866
| | |
| Species | Iassus costalis Walker, 1870
| | |
| Species | Iassus costatus Panzer, 1799
| | |
| Species | Iassus croceus Herrich-Schäffer, 1837
| | |
| Species | Iassus cruentatus Panzer, 1799
| | |
| Species | Iassus dentatus Kuoh, 1983
| | |
| Species | Iassus detractus Walker, 1858 ⇒ Arawa detracta
| | |
| Species | Iassus diadema Fabricius, 1794
| | |
| Species | Iassus dorsalis Matsumura, 1912
| | |
| Species | Iassus dorsiger Le Peletier & Serville, 1825 ⇒ Idiocerus lituratus
| | |
| Species | Iassus elegans Blanchard, 1852
| | |
| Species | Iassus epirrhaena Walker, 1851
| | |
| Species | Iassus evansi Metcalf, 1966
| | |
| Species | Iassus expansus Li & Wang, 1993
| | |
| Species | Iassus extremus Walker, 1852
| | |
| Species | Iassus fenestratus Curtis, 1831
| | |
| Species | Iassus ferrugineus Curtis, 1837 ⇒ Oncopsis alni
| | |
| Species | Iassus flavipennis Zetterstedt, 1828
| | |
| Species | Iassus flavipes Motschulsky, 1859
| | |
| Species | Iassus flavoscutatus Blanchard, 1852
| | |
| Species | Iassus flavovarius Herrich-Schäffer, 1835
| | |
| Species | Iassus formosanus Matsumura, 1912
| | |
| Species | Iassus formosus Boheman, 1845
| | |
| Species | Iassus frontalis Blanchard, 1852
| | |
| Species | Iassus fruticola
| 1 | Subspecies |
| Species | Iassus fulgidus Fabricius, 1775
| | |
| Species | Iassus fulvidorsum Fitch, 1851
| | |
| Species | Iassus fuscinervis Boheman, 1845
| | |
| Species | Iassus fuscomaculatus Kuoh, 1986
| | |
| Species | Iassus fusculus Zetterstedt, 1828
| | |
| Species | Iassus geminatus Li & Wang, 1993
| | |
| Species | Iassus gramineus Fabricius, 1798
| | |
| Species | Iassus grisescens Zetterstedt, 1828
| | |
| Species | Iassus haematoceps Mulsant & Rey, 1855
| | |
| Species | Iassus histrionicus Fabricius, 1794
| | |
| Species | Iassus hyalinipennis Stål, 1854
| | |
| Species | Iassus hyalinus Beauvois, 1820
| | |
| Species | Iassus hypaulacia Walker, 1851
| | |
| Species | Iassus hypaulacius Walker, 1851
| | |
| Species | Iassus ignicans Walker, 1857
| | |
| Species | Iassus ignitus Fabricius, 1787
| | |
| Species | Iassus illex Linnavuori, 1969
| | |
| Species | Iassus immaculipennis Blanchard, 1852
| | |
| Species | Iassus immemorans Walker, 1858
| | |
| Species | Iassus immistus Say, 1830
| | |
| Species | Iassus impurus Boheman, 1847
| | |
| Species | Iassus indicus Lethierry, 1892
| | |
| Species | Iassus infectoriae Abdul-Nour, 1998
| | |
| Species | Iassus inimicus Say, 1830
| | |
| Species | Iassus insularis Curtis, 1837
| | |
| Species | Iassus interruptus Linnaeus, 1758
| | |
| Species | Iassus interstitialis Germar, 1821
| | |
| Species | Iassus irroratus Say, 1830
| | |
| Species | Iassus iziaslavi Anufriev, 1977
| | |
| Species | Iassus laniarius Jacobi, 1943
| | |
| Species | Iassus lanio Linnaeus, 1761 Leafhopper | 2 | Subspecies |
| Species | Iassus lapidescens Scudder, 1877
| | |
| Species | Iassus lateralis Matsumura, 1905
| | |
| Species | Iassus laticeps Walker, 1870
| | |
| Species | Iassus latifrons Blanchard, 1852
| | |
| Species | Iassus latus Shen & Cai, 2010
| | |
| Species | Iassus leucomelas Walker, 1858
| | |
| Species | Iassus leucospilus Walker, 1851
| | |
| Species | Iassus liber Walker, 1858
| | |
| Species | Iassus lineatipennis Stål, 1854
| | |
| Species | Iassus lineatus Fabricius, 1787
| | |
| Species | Iassus lineola Walker, 1858
| | |
| Species | Iassus lineolatus Le Peletier & Serville, 1825 ⇒ Idiocerus lituratus
| | |
| Species | Iassus lineolifer Walker, 1870
| | |
| Species | Iassus lituriceps Walker, 1870
| | |
| Species | Iassus lividellus Zetterstedt, 1840
| | |
| Species | Iassus lucidicosta Walker, 1870
| | |
| Species | Iassus lucidus Butler, 1877
| | |
| Species | Iassus lunatus Statz, 1950
| | |
| Species | Iassus lunulatus Zetterstedt, 1840
| | |
| Species | Iassus maculatus Osborn, 1934
| | |
| Species | Iassus maculiceps Boheman, 1847
| | |
| Species | Iassus maculipennis Stål, 1870
| | |
| Species | Iassus maculipes Curtis, 1837
| | |
| Species | Iassus magnus Distant, 1916
| | |
| Species | Iassus margarita Le Peletier & Serville, 1825 ⇒ Populicerus populi
| | |
| Species | Iassus matsumurai Metcalf, 1966
| | |
| Species | Iassus mayri Kirschbaum, 1868
| | |
| Species | Iassus melanoneurus Heer, 1853
| | |
| Species | Iassus melanopsis Hardy, 1850
| | |
| Species | Iassus melsheimerii Fitch, 1851
| | |
| Species | Iassus mirabilis Orosz, 1979
| | |
| Species | Iassus mixtus Fabricius, 1794
| | |
| Species | Iassus mongolicus Dlabola, 1965
| | |
| Species | Iassus montaguei Distant, 1920
| | |
| Species | Iassus multinotatus Boheman, 1847
| | |
| Species | Iassus multisparsus Jacobi, 1917
| | |
| Species | Iassus muscarius Heer, 1853
| | |
| Species | Iassus nacia Walker, 1851
| | |
| Species | Iassus neruosus Fabricius, 1803
| | |
| Species | Iassus nervosus Fabricius, 1803
| | |
| Species | Iassus nigrifrons Osborn, 1924
| | |
| Species | Iassus nigripes Fabricius, 1794
| | |
| Species | Iassus nitidulis Walker, 1870
| | |
| Species | Iassus nitidulus Walker, 1870 ⇒ Idioscopus nitidulis
| | |
| Species | Iassus nitidus Curtis, 1833
| | |
| Species | Iassus notatus Kuoh, 1986
| | |
| Species | Iassus novellus Say, 1830
| | |
| Species | Iassus obliquus Walker, 1858
| | |
| Species | Iassus ocellaris Fallén, 1806
| | |
| Species | Iassus olitorius Say, 1830
| | |
| Species | Iassus osborni Metcalf, 1966
| | |
| Species | Iassus pallidus Osborn, 1924
| | |
| Species | Iassus paradentatus Li & Wang, 1993
| | |
| Species | Iassus pascuellus Fallén, 1826
| | |
| Species | Iassus pedemantia Walker, 1851
| | |
| Species | Iassus pedematia Walker, 1851
| | |
| Species | Iassus pellucidus Osborn, 1934
| | |
| Species | Iassus peltophlyctis Walker, 1851
| | |
| Species | Iassus perlatus Burmeister, 1838
| | |
| Species | Iassus personatus Curtis, 1831
| | |
| Species | Iassus phragmitis Boheman, 1847
| | |
| Species | Iassus piceatus Distant, 1908
| | |
| Species | Iassus politus Walker, 1870
| | |
| Species | Iassus prasinus Fabricius, 1794
| | |
| Species | Iassus procerus Herrich-Schäffer, 1835
| | |
| Species | Iassus productus Walker, 1851
| | |
| Species | Iassus prostictops Walker, 1851
| | |
| Species | Iassus pseudocerris Abdul-Nour, 1998
| | |
| Species | Iassus psimmythimas Walker, 1851
| | |
| Species | Iassus psudoulmi O.h.Kwon & Jung, 2017
| | |
| Species | Iassus pubipennis Lethierry, 1890
| | |
| Species | Iassus pulchellus Curtis, 1831
| | |
| Species | Iassus pulcher Piton, 1940
| | |
| Species | Iassus pulicaris Fallén, 1806
| | |
| Species | Iassus pulvereus Distant, 1908
| | |
| Species | Iassus punctatissimus Melichar, 1908
| | |
| Species | Iassus punctatus Kirby, 1900
| | |
| Species | Iassus puncticollis Herrich-Schäffer, 1834
| | |
| Species | Iassus puncticosta Walker, 1869
| | |
| Species | Iassus punctifrons Fallén, 1826
| | |
| Species | Iassus punctum Flor, 1861
| | |
| Species | Iassus quadrinotatus Fabricius, 1794
| | |
| Species | Iassus quadrivittatus Marshall, 1866
| | |
| Species | Iassus rama Kirkaldy, 1910
| | |
| Species | Iassus ranjiti Ghosh, 1974
| | |
| Species | Iassus reflexus Kuoh, 1986
| | |
| Species | Iassus reticulatus Fabricius, 1794
| | |
| Species | Iassus rinkihonis Matsumura, 1912
| | |
| Species | Iassus rivularis Germar, 1821
| | |
| Species | Iassus robustus Statz, 1950
| | |
| Species | Iassus rorulentus Stål, 1855
| | |
| Species | Iassus rosae Linnaeus, 1758
| | |
| Species | Iassus rostratus Herrich-Schäffer, 1834
| | |
| Species | Iassus rubiginosus Kuoh, 1983
| | |
| Species | Iassus rubrofrontalis Distant, 1908
| | |
| Species | Iassus rufescens Blanchard, 1852
| | |
| Species | Iassus rupicapra Marshall, 1866
| | |
| Species | Iassus russeolus Fallén, 1826
| | |
| Species | Iassus rusticus Fabricius, 1775
| | |
| Species | Iassus sabulicola Curtis, 1837
| | |
| Species | Iassus sanctus Say, 1830
| | |
| Species | Iassus sayi Fitch, 1851
| | |
| Species | Iassus schrankii Gmelin, 1789 ⇒ Iassus alni
| | |
| Species | Iassus scutellaris Fieber, 1868
| 1 | Subspecies |
| Species | Iassus septemnotatus Fallén, 1806
| | |
| Species | Iassus sepultus Meunier, 1920
| 2 | Subspecies |
| Species | Iassus serratulae Fabricius, 1775
| | |
| Species | Iassus setifer Walker, 1858
| | |
| Species | Iassus sexnotatus Fallén, 1806
| | |
| Species | Iassus sinensis Walker, 1851
| | |
| Species | Iassus sinhalanus Kirkaldy, 1910
| | |
| Species | Iassus smithii Baker, 1900
| | |
| Species | Iassus socialis Flor, 1861
| | |
| Species | Iassus sordidus Baker, 1900
| | |
| Species | Iassus splendidulus Fabricius, 1803
| | |
| Species | Iassus stactogala Walker, 1851
| | |
| Species | Iassus stramineus Baker, 1900
| | |
| Species | Iassus striatulus Fallén, 1806
| | |
| Species | Iassus striola Fallén, 1806
| 1 | Subspecies |
| Species | Iassus stylatus Boheman, 1847
| | |
| Species | Iassus subfusculus Fallén, 1806
| | |
| Species | Iassus subfuscus Li & Wang, 1993
| | |
| Species | Iassus subrusticus Fallén, 1806
| | |
| Species | Iassus sujfunus Anufriev, 1971
| | |
| Species | Iassus taeniola Curtis, 1837
| | |
| Species | Iassus tenuis Germar, 1821
| | |
| Species | Iassus testaceus Walker, 1852
| | |
| Species | Iassus tetrops Jacobi, 1917
| | |
| Species | Iassus transversus Fallén, 1826
| | |
| Species | Iassus triangularis Fabricius, 1794
| | |
| Species | Iassus tristis Zetterstedt, 1840
| | |
| Species | Iassus trunctus Li & Wang, 1993
| | |
| Species | Iassus tutuilanus Osborn, 1934
| | |
| Species | Iassus ulmi Kusnezov, 1929
| | |
| Species | Iassus undatus DeGeer, 1773
| | |
| Species | Iassus vaginatus Kirschbaum, 1868
| | |
| Species | Iassus variatus Hardy, 1850
| | |
| Species | Iassus venosus Fourcroy, 1785
| | |
| Species | Iassus ventralis Fallén, 1806
| | |
| Species | Iassus vermiculatus Blanchard, 1852
| | |
| Species | Iassus verticis Say, 1830
| | |
| Species | Iassus viduus Stål, 1859
| | |
| Species | Iassus viridis Linnaeus, 1758
| | |
| Species | Iassus viridoflavidus Metcalf, 1946
| | |
| Species | Iassus vitreicosta Walker, 1858
| | |
| Species | Iassus vitripennis Flor, 1861
| | |
| Species | Iassus vittatus Linnaeus, 1758
| | |
| Species | Iassus walkeri Metcalf, 1966
| | |
| Species | Iassus xantholues Walker, 1851
| | |
| Species | Iassus zelleri Kirschbaum, 1868
| | |
| Species | Iassus zinnevia Walker, 1851
| | |