The genus name Hamadryas may refer to:

  • Animalia:
    • Hamadryas Hübner, 1806 (Lepidoptera, Nymphalidae)
    • Hamadryas Mikan, 1821, junior homonym [=Caligo Hübner, 1819] (Lepidoptera, Nymphalidae)
    • Hamadryas Boisduval, 1832, junior homonym [=Tellervo Kirby, 1895] (Lepidoptera, Nymphalidae)
    • Hamadryas Cantor, 1838, junior homonym [=Ophiophagus Günther, 1864] (Reptilia, Elapidae)
    • Hamadryas Lesson, 1840, junior homonym [=Papio Erxleben, 1777] (Mammalia, Cercopithecidae)
    • Hamadryas Albers, 1850, junior homonym [=Otostomus Beck, 1837] (Gastropoda, Bulimulidae)
    • Hamadryas Clemens, 1864, junior homonym [=Euclemensia Grote, 1878] (Lepidoptera, Cosmopterigidae )
  • Plantae:
    • Hamadryas Comm. ex Juss. (1789) (Ranunculales, Ranunculaceae)