Belarus-
-Orthodox 48.3%
-Catholic 7.1%
-Other 3.5%
-Non-religious 41.1%
Bulgeria-
-Eastern Orthodox 59.4%
-Islam 7.8%
-Other 1.7%
-Non-religious 3.7%
-Unspecified 27.4%
Czech Republic-
-Roman Catholic 10.4%
-Protestant 1.1%
-other 54%
-Non-religious 34.5%
Hungary-
-Roman Catholic 37.2%
-Calvinist 11.6%
-Lutheran 2.2%
-Greek Catholic 1.8%
-other 1.9%
-Non-religious 18.2%
-unspecified 27.2%
Poland-
-Roman Catholic 86.9%
-Orthodox 1.3%
-Protestant 0.4%
-other 0.7%
-unspecified 10.8%
Republic of Moldova-
-Eastern orthodox 93.3%
-Catholic 0.5%
-Other 4.8%
-Non-religious 1.4%
Romania-
-Eastern Orthodox 81.9%
-Protestant 6.4%
-Roman Catholic 4.3%
-other 0.9%
-Non-religious 0.2%
-unspecified 6.3%
Russian Federation-
-Russian Orthodox 75%
-Islam 5%
-Other 11%
Slovakia-
-Roman Catholic 62%
-Protestant 8.2%
-Greek Catholic 3.8%
-Other 12.5%
-non-religious 13.4%
Ukraine-
-Ukrainian Orthodox 72%
-Greek Catholic 14.1%
-Protestant 2.4%
-Roman Catholic 1.7%
-Islam 0.6%
-Other 9.9%
Total Percentages
Orthodox 4.96%
Other 16.05%
Non-religious 11.25%
Eastern orthodox 23.46%
Islam 1.34
Unspecified 7.17%
Roman Catholic 20.25%
Russian Orthodox 7.5%
Ukrainian Orthodox 7.2%
As seen in the pie chart above, the dominant religions in Eastern Europe are Eastern Orthodox and Roman Catholic. There are many smaller religions shown as well. Although the primary religion is Christianity broken down into hundreds of smaller groups, there is still some variety.
Above is in the Church of the Holy Sepulchre, an Eastern Orthodox church.
Above is Pope Francis, the Pope of the Roman Catholic church during a service on Holy Saturday.
In this sub-region, the main religion is Christianity. The two main branches of Christianity found in this area is Eastern Orthodox and Roman Catholicism. Out of all of Eastern Europe there is a less than 4% Jewish population. This is the effect of World War II and the ongoing persecution of Jews. Although situations are improving, there are still thousands leaving the area to a place with more religious diversity.
This is a chart of Jews living in countries in Eastern Europe and Israel, as you can tell as the population in Israel is growing everywhere else it is declining.