Priscagrion is a genus of damselflies in the family Priscagrionidae. The genus is restricted to southern China and contains two described species.

Members of the genus are medium-sized to fairly large damselflies associated with forest streams. They have long legs, slender bodies and clear wings, although males possess a distinctive dark patch near the wing tips. Adults perch with their wings held outstretched and have black bodies marked with bright blue patterning, particularly towards the end of the abdomen.

When describing the genus in 2001, Zhou and Wilson regarded Priscagrion as an archaic lineage distinguished by its unusual wing venation and other morphological features. Molecular phylogenetic studies later showed that it forms a distinct lineage together with Sinocnemis, leading to the establishment of the family Priscagrionidae in 2021.

...