Religion in Greece

Religion in Greece is dominated by Christianity, in particular the Greek Orthodox Church, which is within the larger communion of the Eastern Orthodox Church; moreover, Eastern Orthodox Christianity is the official state religion. It represented 81 to 90% of the total population in 2022 and is constitutionally recognized as the "prevailing religion" of Greece. Religions with smaller numbers of followers include Islam followed by different communities of Greek Muslims (now comprising only 2% of the population), Western Catholicism (comprising 1% of the population), Greek Catholicism, Judaism, Evangelicalism, Hellenic paganism, and Jehovah's Witnesses. A number of Greek atheists exist, not self-identifying as religious.

Religion is key part of identity for most Greeks, with 76% of Greeks in a 2015–2017 survey saying that their nationality is defined by Christianity. According to other sources, 81.4% of Greeks identify as Orthodox Christians and 14.7% are atheists.