Erpetogomphus is a genus of dragonfly in the family Gomphidae. They are commonly known as ringtails. Most of the species are predominantly green coloured and the males have a moderately clubbed tail.

The genus contains the following species:

• Erpetogomphus agkistrodon Garrison, 1994
• Erpetogomphus boa Selys, 1859
• Erpetogomphus bothrops Garrison, 1994 – one-striped ringtail
• Erpetogomphus compositus Hagen in Selys, 1858 – white-belted ringtail
• Erpetogomphus constrictor Ris, 1918 – knob-tipped ringtail
• Erpetogomphus cophias Selys, 1858
• Erpetogomphus crotalinus (Hagen in Selys, 1854) – yellow-legged ringtail
• Erpetogomphus designatus Hagen in Selys, 1858 – eastern ringtail
• Erpetogomphus elaphe Garrison, 1994
• Erpetogomphus elaps Selys, 1858 – straight-tipped ringtail
• Erpetogomphus erici Novelo & Garrison, 1999
• Erpetogomphus eutainia Calvert, 1905 – blue-faced ringtail
• Erpetogomphus heterodon Garrison, 1994 – dashed ringtail
• Erpetogomphus lampropeltis Kennedy, 1918 – serpent ringtail
• Erpetogomphus leptophis Garrison, 1994 – dark-shouldered ringtail
• Erpetogomphus liopeltis Garrison, 1994
• Erpetogomphus ophibolus Calvert, 1905
• Erpetogomphus sabaleticus Williamson, 1918
• Erpetogomphus schausi Calvert, 1919
• Erpetogomphus sipedon Calvert, 1905
• Erpetogomphus tristani Calvert, 1912
• Erpetogomphus viperinus Selys, 1868

A single fossil species, †Erpetogomphus shii Zheng et al., 2018 known from the Early Miocene-aged Mexican amber

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