Polychrono (Greek: Πολύχρονο, IPA: [poˈlixrono]) is a tourist town located in the eastern part of the peninsula of Kassandra, Chalkidiki, Greece. The population in 2001 was 1,063, the elevation is 10 m. Polychrono is situated on the northeastern coast of the peninsula, 4 km northwest of Chaniotis and 85 km southeast of Thessaloniki. There are forests in the mountains near Polychrono, and farmlands near the coast. Tourism is an important sector in Polychrono, attracted by its beach.
In the modern village is placed the site of ancient Neapolis, which in Roman times was rebuilt in a near place whith remains of a Roman settlement.