Odontogomphus donnellyi is a species of dragonfly of the family Gomphidae, known as a pinchtail. It is endemic to north-eastern Queensland, Australia, where it inhabits rainforest streams. It is a medium-sized and slender dragonfly with black and greenish-yellow markings.
Odontogomphus donnellyi is the only known species in the genus Odontogomphus.