Kastania is a village in Servia municipality, Kozani regional unit, in the Greek region of Macedonia.

It is situated at an altitude of 1,050 metres (3,445 ft) above sea level.

At the 2021 census the population was 514.

[1] The Monastery of Agioi Theodoroi at Kastania and the Byzantium Monastery of St. Antonios Siapkas are both located in Kastania.

[2] This Western Macedonia location article is a stub.