Ithoria (Greek, Ancient (to 1453);: Ἰθωρία) was a town of ancient Aetolia, near the Achelous River, and a short distance south of Conope. It was situated at the entrance of a pass, and was strongly fortified both by nature and by art. It was taken by Philip V of Macedon and levelled to the ground in 219 BCE.
Its site is located near the modern Agios Ilias.