Ersa is a figure in Greek mythology.
Ersa may refer to:
Ersa, Haute-Corse – a commune of the Haute-Corse department of France, on the island of Corsica Ersa (moon) - a small moon of Jupiter European Regional Science Association (ERSA) – the European section of the Regional Science Association International En Route Supplement Australia (ERSA) – part of the Aeronautical Information Publication (AIP) published by Airservices Australia
See also Erza (disambiguation) Ursa (disambiguation)