Williamsonia is a genus of small dragonflies in the family Corduliidae.

Unlike other genera of emerald dragonflies, they have dark eyes and nonmetallic bodies.

[1] The genus was established by entomologist John June Davis and named after the American banker and amateur odonatologist Edward Bruce Williamson.

The genus consists of only two living species:[2]

This article related to Corduliidae is a stub.