Akdağmadeni (Greek: Ἀργυρίων, Argyríōn ) is a town in the Yozgat Province in the Central Anatolia region of Turkey. It is the seat of Akdağmadeni District. Its population is 22,180 (2022). Its elevation is 1344 m. According to the Ottoman population statistics of 1914, the kaza of Akdağmadeni had a total population of 48,759, consisting of 37,081 Muslims, 7,892 Greeks, 3,312 Armenians, 49 Protestants and 425 Roma.