Markopoulo Oropou (Greek: Μαρκόπουλο Ωρωπού) is a town and a former community of East Attica, Greece.
[3] Markopoulo Oropou is situated 3 km south of the South Euboean Gulf coast.
It is 4 km southeast of Nea Palatia and 35 km north of Athens city center.
The municipal unit Markopoulo Oropou consists of the town Markopoulo and the villages Neo Livyssi, Agia Varvara and Bafi.
The village has historically been an Arvanite settlement.