Southern Ukraine
According to a 2016 survey of religion in Ukraine conducted by the Razumkov Center, around 65.7% of the population of southern Ukraine declared to be believers in any religion, while 7.4% declared to be non-believers, and 3.2% declared to be atheists and agnostics. the study also found that 77.6% of the total Southern Ukraine population declared to be Christians (71.0% Eastern Orthodox, 5.1% simply Christians, 0.5% Latin Rite Catholics, 0.53% members of various Protestant churches, 0.5% members of the Ukrainian Greek Catholic Church), and 0.5% were Jewish. Not religious and other believers not identifying with any of the listed major religious institutions constituted about 24.7% of the population.
Eastern Orthodoxy by country
Eastern Orthodoxy is the largest single religious faith in the world's largest country by area: Russia (41%-77%), where roughly half of the Eastern Orthodox Christians live. It is the majority religion in Ukraine (65.4%-77%), Romania (82%), Belarus (48%-73%) Greece (95%-98%), Serbia (85%), Bulgaria (88%), Moldova (93%), Georgia (84%), Macedonia (65%), Cyprus (89%), Montenegro (72%), Estonia (14%), and it is also predominant in the disputed territories of Abkhazia, South Ossetia and Transnistria.