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%.
History of Christianity in Ukraine
The recent events of the 2004 Ukrainian presidential election and the Orange Revolution affected the religious affairs in the nation as well. The UOC (MP) actively supported the former Prime minister Viktor Yanukovych while members of the UOC-KP, UAOC, and UGCC supported the opposition candidate Viktor Yushchenko, who was running against him. After Yushchenko's victory, the UOC (MP) criticised him for what they see as support of the "uncanonical organisations", such as his celebrating Orthodox Christmas in St Volodymyr's Cathedral (owned by UOC-KP). Yushchenko himself has publicly pledged to distance himself from Orthodox politics during his presidential campaign. Nonetheless, he claims that his intention is to achieve a unity of the nation's Eastern Orthodox Church affairs. Questions still arise on what will be the ecclesiastical status of the Church and who will head it, and as of February 2007 no public dialogue has begun.