Aegialus or Aigialos (), meaning "Coast-Land", refers to two ancient locations:

A region in the northern Peloponnese, where Aegium is one of the main Achaean cities. The region later became known as Achaia. A coastal town in ancient Paphlagonia, located near Karaağaç Limanı, Asiatic Turkey.

Both locations are mentioned by Homer in Book 2 of the Iliad, with the first being an Achaean ally in line 575 and the second a Trojan alley in line 855.

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