Orthogonius is a genus of beetles in the family Carabidae, containing the following species: * Orthogonius acrogonus Wiedemann, 1819 * Orthogonius acutangulus Chaudoir, 1878 * Orthogonius adoriae Tian & Deuve, 2006 * Orthogonius aemulus Peringuey, 1896 * Orthogonius alternans Wiedemann, 1823 * Orthogonius alutaceus Quedenfeldt, 1883 * Orthogonius andrewesi Emden, 1928 * Orthogonius andrewesianus Tian & Deuve, 2006 * Orthogonius angkor Tian & Deuve, 2006 * Orthogonius angustus Chaudoir, 1871 * Orthogonius annamensis Jedlicka, 1965 * Orthogonius annamicola Tian & Deuve, 2006 * Orthogonius annemariae Tian & Deuve, 2006 * Orthogonius assamensis Tian & Deuve, 2006 * Orthogonius assamicola Tian & Deuve, 2006 * Orthogonius assmuthi Wasmann, 1920 * Orthogonius bacon