Androusa (Greek: Ανδρούσα) is a village and a former municipality in Messenia, Peloponnese, Greece.

This was the same period as when the Androusa fortress/castle is thought to have been built, of which city walls and partially ruined towers remain on the village's eastern perimeter overlooking the Pamisos River and the Messenian plain.

There are alternate theories pointing to an earlier (and possible Byzantine) construction due to certain design elements of the fortress walls.

Later in the 14th century, Androusa developed into an important religions seat, becoming the base of the Episcopal with the Decree of Patriarch Athanasios (1304-1310) who was from the village.

After recapture by the Byzantines, it later became part of the Ottoman Empire as with the majority of the Peloponnese after the fall of Constantinople, and largely remained this way until liberation in the Greek War of Independence.