Damastes of Sigeum (Ancient Greek: Δαμάστης) was a Greek geographer and historian in the 5th century BC from Sigeum.^{[1] [2]}

He was probably a pupil of Hellanicus of Lesbos. With the exception of a few fragments, his works do not survive.^[3]

Suda wrote that he had many works including the:^[4]

• Events in Greece
• On the Children and Ancestors of those who took part in the Expedition to Troy (also ascribed by some sources to Polus of Acragas)
• Gazetteer of Peoples and Cities
• On Poets and Sophists

He is mentioned in Dionysius of Halicarnassus work Roman Antiquities.^[5]