Kropia (Greek: Κρωπία) is a municipality in East Attica, Greece. It is located 16 km southeast of Athens at the fringes of the Athens metropolitan area, and has a land area of 102.0 km². Its population was 30,307 at the 2011 census. The seat of the municipality is in the town of Koropi (pop. 19,164). In descending order of population, its other villages are Kítsi (pop. 4,788), Agía Marína (3,765), Karellás (1,579), and Ágios Dimítrios (1,011).
^"Prospectus." Marfin Investment Group. 8 February 2010. Retrieved on 27 June 2010. "OLYMPIC AIR’s registered seat is located at the 1st km of Koropi-Vari Avenue and Ifaistou Str., in the municipality of Koropi, Prefecture of Attica."