Katastari () is a village and a community in the Alykes municipal unit of the island Zakynthos, Greece. It is situated at the foot of the Vrachionas mountain, 2 km from the Ionian Sea coast. It is located 13 kilometers northwest of Zakynthos City and 10 km southeast of Volimes.
Population Year Population 1981 1,097 1991 1,190 2001 1,287 2011 1,379 2021 1,331
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