Dia
Δῖα
Dia (Δῖα: Eth. Διεύς), a town of Bithynia on the Pontus.
(Steph. B. sub voce Δῖα.) Marcian (Peripl. p. 70) places it 60 stadia east of the mouth of the Hypius, which river is between the Sangarius and Heraclea. The name in Marcian, Δίας πόλις, may be a mistake for Diospolis, which Ptolemy has (5.1). It seems probable that the Dia of Stephanus and this Diospolis are the same. There are some very rare coins with the epigraph Διας, which Sestini assigns to this place.
From William Smith (ed.), Dictionary of Greek and Roman Geography. Text provided under a CC BY-SA license by Perseus Digital Library, http://www.perseus.tufts.edu, with funding from the National Endowment for the Humanities and Tufts University. Data accessed from https://github.com/PerseusDL/canonical-pdlrefwk/ on 17 October 2026.