Phazemon (Ancient Greek: Φαζημών), also known as Thermai Phazemoniton, was a town in the west of ancient Pontus, south of the Gazelonitis, and north of Amasia; it contained hot mineral springs. Pompey, after his victory over Mithridates, planted a colony there, and changed its name into Neapolis, from which the whole district was called Neapolitis, having previously been called Phazemonitis.

Its site is located near Havza, Samsun Province, Turkey.

This article incorporates text from a publication now in the public domain: Smith, William, ed. (1854–1857). "Phazemon". Dictionary of Greek and Roman Geography. London: John Murray.

40°58′06″N 35°40′01″E/40.96824°N 35.66699°E/ 40.96824; 35.66699