Mecidiye (formerly: Köseatlñ) is a village in Keà Âan District of Edirne Province, Turkey. Its population is 840 (2022). Mecidiye is close to the Gulf of Saros (Aegean Sea). The distance to Keà Âan is . The settlement was founded by the Muslim refugees of the Russo-Turkish War (1877-1878). Before the 2013 reorganisation, it was a town (belde). Major economic activities of the town are fishing, beekeeping and farming. Tourism is also promising.