The Mesogeia or Mesogaia (Greek: τα Μεσόγεια, η Μεσόγαια/Μεσογαία, "Midlands") is a geographical region of Attica in Greece.
[1] The term acquired a technical meaning with the reforms of Cleisthenes in c. 508 BC, when each of the ten Attic tribes was in territory composed of three zones (trittyes), urban (asty, the main city of Athens), interior (mesogeia) and coastal (paralia).
To the east the Mesogeia reaches the Aegean Sea at the Petalioi Gulf, but is separated from the actual coastline by a line of low hills.
[2] In the late Middle Ages, the area was the site of Albanian (Arvanite) settlement, as can be seen from toponyms such as Spata or Liopesi.
[3] Before the 2011 Kallikratis reform, the area comprised the municipalities of Gerakas, Glyka Nera, Anthousa, Pallini, Paiania, Pikermi, Spata, Artemida, Rafina, Markopoulo Mesogaias, Keratea, Koropi, Kalyvia Thorikou, Vari, Kouvaras, and Voula.