Ancient Dion is an archaeological site of the ancient Macedonian city’s ruins, at the border of Thessaly near Thermaikos Gulf and Aliakmonas River. It is believed to have been named after the temple of Almighty Zeus (Dias), the foundations of which can still be seen near the temple of Isida.

There are two more cities carrying the same name. One of them is at the peninsula of Chalkidiki and Strymonikos Gulf and the second one is in Evia, cape Kinaion, near Diades Athines.

The findings of the excavations are exhibited at the archaeological museum, built in 1983. It is located in the modern village of Dion, 500m from the entrance of the archaeological site.