- Orius (Orius) laevigatus (Fieber, 1860)
- Orius (Orius) laevigatus laevigatus (Fieber, 1860)
- Orius (Orius) laevigatus maderensis (Reuter, 1884)
- Orius (Orius) limbatus Wagner, 1952
- Orius (Orius) lindbergi Wagner, 1952
- Orius (Orius) niger (Wolff, 1811)
- Orius (Orius) pallidicornis (Reuter, 1884)
- Orius (Orius) piceicollis (Lindberg, 1936)
- Orius (Orius) takaii Yasunaga, 2000
- Orius (Paraorius) tantillus (Motschulsky, 1863)
- Orius (Trichorius) atratus Yasunaga, 1997
- Orius (Xylorius) miyamotoi Yasunaga, 1997
- Orius sublaevis (Poppius, 1909)
- Orius Wolff, 1811
- Orocephalus Mulsant & Rey, 1866
- Oronabis Hsiao, 1964
- Orsillodes longirostris (Puton, 1884)
- Orsillus depressus (Mulsant & Rey, 1852)
- Orsillus maculatus (Fieber, 1861)
- Orsillus pinicanariensis Lindberg, 1953
- Orsillus potanini Linnavuori, 1978
- Orsillus reyi Puton, 1871
- Orthocephalus arnoldii (V.G. Putshkov, 1961)
- Orthocephalus bivittatus Fieber, 1864
- Orthocephalus brevis (Panzer, 1798)
- Orthocephalus championi Saunders, 1894
- Orthocephalus coriaceus (Fabricius, 1777)
- Orthocephalus fulvipes Reuter, 1904
- Orthocephalus funestus Jakovlev, 1881
- Orthocephalus medvedevi Kiritshenko, 1951
- Orthocephalus melas Seidenstücker, 1962
- Orthocephalus minimus Drapolyuk & Kerzhner, 2000
- Orthocephalus modarresi Linnavuori, 1997
- Orthocephalus proserpinae (Mulsant & Rey, 1852)
- Orthocephalus putshkovi Namyatova & Konstantinov, 2009
- Orthocephalus rhyparopus Fieber, 1864
- Orthocephalus saltator (Hahn, 1835)
- Orthocephalus scorzonerae Drapolyuk & Kerzhner, 2000
- Orthocephalus sefrensis Reuter, 1895
- Orthocephalus solidus (Seidenstücker, 1971)
- Orthocephalus styx Reuter, 1908
- Orthocephalus tibialis (Reuter, 1894)
- Orthocephalus tristis (Reuter, 1894)
- Orthocephalus turkmenikus Namyatova & Konstantinov, 2009
- Orthocephalus vittipennis (Herrich-Schaeffer, 1835)
- Ortholomus batui J.L. Li & Nonnaizab, 2004
- Ortholomus carinatus (Lindberg, 1932)
- Ortholomus jordani Hoberlandt, 1953
- Ortholomus punctipennis (Herrich-Schaeffer, 1838)
- Orthonotus alpestris (Reuter, 1906)