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Palaiochouni (Greek: Παλαιοχούνη) is a village in the municipal unit Valtetsi, Arcadia, Greece. It is situated in the hills on the eastern end of the plain of Megalopoli, at 700 m elevation. It is 2 km east of Mallota, 3 km west of Athinaio, 7 km east of Megalopoli and 19 km southwest of Tripoli. The Greek National Road 7 (Kalamata - Megalopoli - Tripoli) passes through the village. Palaiochouni had a population of 42 in 2001.
- De Facto Population of Greece Population and Housing Census of March 18th, 2001 (PDF 39 MB). National Statistical Service of Greece. 2003.