Galatsi (Greek: Γαλάτσι, Galátsi [ɣaˈlatsi]), called in Katharevousa Galatsion (Greek: Γαλάτσιον, Galátsion), is a northern suburb of Athens, Greece, and a municipality of the Attica region. The municipality has an area of 4.026 km2. Until the mid-20th century, the area was mainly made up of farmlands but due to the continuous expansion of the Greek capital, Galatsi was rapidly urbanised and has come to lie in the center of the Athens agglomeration.