Eastern Ukraine
According to a 2016 survey of religion in Ukraine held by the Razumkov Center, 73.5% of the population in Eastern Ukraine were Christians (63.2% Eastern Orthodox, 8.1% simply Christians, 1.0% Protestants, and 0.3% Latin Rite Catholics), 0.5% were Muslims, 0.3% were Jewish, and 0.3% were Hindus. Not religious and other believers not identifying with any of the listed major religious institutions constituted about 24.7% of the population. It also showed that approximately 55.6% of the population of eastern Ukraine (which in Razumkov's mapping excluded Donbass and consisted of the regions immediately to the west of it) declared to be believers, while 13.4% declared to be undecided or non-believers, and 3.5% declared to be atheist. 
A 2007 survey by the Razumkov Centre asked "Would you like to have your region separated from Ukraine and joined another state?" In eastern Ukraine, 77.9% of respondents disagreed, 10.4% agreed, and the rest were undecided. 
In a poll conducted by the Kyiv International Institute of Sociology in the first half of February 2014, 25.8% of those polled in East Ukraine believed "Ukraine and Russia must unite into a single state", nationwide this percentage was 12.5%.
Ukrainian Brazilians
It should be also noticed that some Ukrainians were also Protestant, belonging to the Baptist and Pentecostals branch of Christianity. Originally coming from Volyn Region, they brought their Ukrainian traditions of worshipping God. The biggest church was the Russian Assembly of God (90% were Ukrainians and the rest Russians, Poles, Bielo Russians and few Lithuanians) based in São Paulo. It was founded around 1930 and led by Pr. Szymon Misiuk with branches in Arapongas -PR, Apucarana - PR, Curitiba - PR, Erexin and Santa Rosa - RS. São Caetano do Sul, in São Paulo State had a big concentration of Ukrainians as well and the First Ukrainian Baptist Church was established there by Rev. Dmitro Bucky. Many other churches were also based in São Paulo. The Ukrainian Protestants were not able to maintain their ethnic identity and with the oldtimers passing away, the new generation did not keep the tradition of services in Ukrainian language, churches disappeared or were turned into Brazilian churches, and Slavic connections disappeared.