Libellula is a genus of dragonflies, called chasers (in English) or skimmers (in American), in the family Libellulidae. They are distributed throughout the temperate zone of the Northern Hemisphere. Many have showy wing patterns.

The taxa Ladona (corporals) and Plathemis (whitetails) have been considered as synonyms of Libellula, subgenera, or separate genera by different authorities. Recent phylogenetic analysis has supported their status as either subgenera or full genera.

The genus name comes from Latin libella, meaning "a carpenter's level".

List of species.