Megara Hyblaea – perhaps identical with Hybla Major – is an ancient Greek colony of Magna Graecia in Sicily, situated near Augusta on the east coast, 20 kilometres (12 mi) north-northwest of Syracuse, Italy, on the deep bay formed by the Xiphonian promontory. There were at least three cities named "Hybla" in ancient accounts of Sicily which are often confounded with each other, and among which it is sometimes very difficult to distinguish.

Magna Graecia was the name given by the Romans to the Greek-speaking coastal areas of Southern Italy in the present-day Italian regions of Calabria, Apulia, Basilicata, Campania and Sicily; these regions were extensively populated by Greek settlers starting from the 8th century BC.