Greek Orthodox

Greek Orthodoxy is part of the Eastern Orthodox Church, one of the oldest continuously existing Christian traditions, tracing its lineage to the apostles and the Greek-speaking churches of the Roman Empire. Worship centers on the Divine Liturgy, an elaborate chanted service rich in incense, icons, and ancient prayers, and the faith is structured around seven sacraments — most prominently baptism and the Eucharist. The tradition holds Holy Scripture and Sacred Tradition in equal authority and recognizes the Ecumenical Patriarch of Constantinople as the "first among equals" of Orthodox bishops worldwide. Theologically, Greek Orthodoxy emphasizes theosis — the gradual transformation of the believer into the likeness of God through grace, prayer, fasting, and participation in the sacraments.

Countries by Greek Orthodox Population (2)

1. 1. 🇬🇷 Greece 85.5%
2. 2. 🇫🇮 Finland 1.1%

Note: This list reflects only countries where the CIA World Factbook — our data source — explicitly uses the “Greek Orthodox” label. Adherents in many other countries are rolled into broader buckets such as Protestant, Evangelical, or country-specific denominations, so this ranking undercounts global presence.