Agia Triada (Greek: Αγία Τριάδα, meaning the Holy Trinity) is a village in the northern part of the municipal unit of Lasiona, Olympia, Elis, Greece.

It is situated near the river Pineios, which forms the border with Achaea here.

It is located 7 km northwest of Antroni, 7 km east of Simopoulo, 9 km south of Stavrodromi and 24 km north of Olympia.

The Greek National Road 33 (Patras - Tripoli) runs through the village.