Kleitor or Cleitor (Greek: Κλείτωρ) is a former municipality in Arcadia, Peloponnese, Greece. Since the 2011 local government reform it is part of the municipality Gortynia, of which it is a municipal unit. The municipal unit has an area of 150.582 km2. Its population was 1,406 in 2011. The seat of the municipality was in Mygdalia.
Cleitor was a historic and powerful city-state in ancient Greece.
The municipal unit Kleitor is subdivided into the following communities (constituent villages in brackets):
Kerpini (Kerpini, Ano Kalyvia, Kato Kalyvia)
Mygdalia (Mygdalia, Palaiopyrgos)
Pournaria (Pournaria, Mouria)
Prasino (Prasino, Kalyvia Karnesi)
Valtesiniko (Valtesiniko, Kourouveli, Olomades)