Melissia () is a village in Achaea, Greece, part of the municipal unit of Aigio. It is located 8 km south of Aigio, near the right bank of the river Selinountas. Melissia had a 2011 population of 317 for the village and 343 for the community, which includes the villages Lakka and Pyrgaki. Melissia suffered damage from the July 2007 forest fires.