Kastania (Greek: Καστανιά) is a village in Pieria, Greece. It is part of the municipal unit of Kolindros. Its population as of the 2001 census was 423.[1] It dates from Byzantine times, and Byzantine churches are still in evidence. It is a picturesque mountain village situated at the beginning of a large gorge leading down to a beach. Wealth derives from its surrounding farm land and from shipping.