The percentage of Americans who identify as Orthodox Christian declined slightly from 0.5 percent in 2014 to 0.4 percent in 2023, according to PRRI's 2023 Census of American Religion. (PRRI describes itself as a nonprofit, nonpartisan organization that "conducts independent research and driving conversations at the intersection of religion, culture, and politics.") On the plus side, Orthodox Christians had the lowest median age (41) of adults for all Christian traditions — suggesting that the religion has more capacity for growth than other traditions.
Much better opportunities can be found in countries in which Orthodox Christianity is the leading religion. These include Belarus, Bulgaria, Cyprus, Georgia, Greece, Macedonia, Moldova, Montenegro, Romania, Russia, Serbia, and Ukraine.