Gavalou (Greek: Γαβαλού) is a town and a community in the municipal unit of Makryneia, Aetolia-Acarnania, Greece.

Gavalou may be built at or near the site of the ancient Aetolian town Trichonium, from which the Lake Trichonida derived its name.

He attacked the rear of the army of Philip on his return from Thermus, but the attempt was unsuccessful, and many Aetolians fell.

Gavalou is after Sparta the area with the highest average summer maximum temperatures in the country.

Like most of Western Greece it receives a lot of rainfall during the winter and autumn with an average annual precipitation of more than 1.100 mm.