Oryctodiplax is an extinct genus of dragonfly in the family Libellulidae.
Fossils (mainly larvae) of these dragonflies have been found in the Miocene of Italy (age range: from 7.246 to 5.332 million years ago).
The type species is Oryctodiplax gypsorum. It was a species resistant to a highly saline environment, formed in the Mediterranean salinity crisis, occurred during the latest stage of the Miocene, with the isolation of the Mediterranean sea and its subsequent drying.