Kastraki (Greek: Καστράκι, before 1927: Ομέρ Εφένδη - Omer Efendi[2]) is a village in Phocis, Greece, part of the municipal unit Efpalio.

Despite some early military success, his gradual but continuous losses of his hoplites forced him to make a treaty with the Aeolians and retreat back to Oineon and Nafpaktos with the remnants of his army.

Phocis was not any different; Turks had taken from Greeks the most fertile areas of Mornos plains as it is evidenced by the township names of Omer Efendi (Kastraki), Hasan–Aga (Agios Polykarpos), Sule (short for Suleiman) today’s Efpalio.

A couple of kilometers east of Mornos River near Omar Effendi they met the troops of Triantafyllos Apokoritis and were forced to retreat.

About 2 km east of Mornos River near Omar Effendi, they were surprised by the cavalry of Hatzimichales (under Karaiskakis's leadership although he was not there) killing 53, capturing 22, and turning the troops back to Nafpaktos.

[2] The name Kastraki was justified by the remnants of a Locric ancient castle at the borders of Locris and Aetolia about 3 km southwest of the village Trikorfo.