Hysiae or Hysiai () or Hysia (Ὑσία) may refer to:
Hysia (Arcadia), a town of ancient Arcadia, Greece Hysiae (Argolis), a garrison town in Greece southwest of Argos, where two battle were fought: Battle of Hysiae (c. 669 BC) Battle of Hysiae (417 BC) Hysiae (Boeotia), a village in Boeotia, was not far from Plataea and is mentioned by Thucydides Hysia (beetle), a genus of ladybird in family Coccinellidae