Agia Triada (Greek: Αγία Τριάδα) is a former municipality in Kastoria regional unit, Western Macedonia, Greece.

Since the 2011 local government reform it is part of the municipality Kastoria, of which it is a municipal unit.

[2] The municipal unit has an area of 99.092 km2.

The seat of the municipality was in Maniakoi.

This Western Macedonia location article is a stub.