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%.
Slavic Native Faith
After the fall of the Soviet Union, Ukraine became an independent republic, with many Ukrainians turning to strongly nationalistic agendas; among those to have done so are pseudo-archaeologists like Yuri Shylov, who posits Ukraine as the "cradle of civilisation". It is within this broader milieu of cultural nationalism and interest in alternative spiritualities that Slavic Native Faith re-emerged in Ukraine. The United States-based Native Ukrainian National Faith established itself in Ukraine soon after independence, with the first congregation in Ukraine gaining official recognition in Kiev in 1991. There had been schisms in the international organisation of Native Ukrainian National Faith. A number of senior followers broke with Sylenko during the 1980s, rejecting the idea that he should be the ultimate authority in the religion; they formed the Association of Sons and Daughters of the Native Ukrainian National Faith (OSID RUNVira) and secured legal control of the temple in Spring Glen. A second group, the Association of Sons and Daughters of Ukraine of the Native Ukrainian National Faith (OSIDU RUNVira), maintained links with Sylenko himself, whom it regards as a prophet, and adopted his "Maha Vira" as a sacred text. Despite the animosity that existed between these rival Ukrainian groups, there was some collaboration between them. In 2003, the First Forum of Rodnovers was held in the country, resulting in two public proclamations: the first urged the country's government to protect what the Rodnovers regarded as sacred sites and objects, and the second called on the government not to go ahead with the proposed privatisation of agricultural land. That same year, a group called Ancestral Fire of the Native Orthodox Faith was established; in contrast to the anti-Russian slant taken by Sylenko, it embraced a Pan-Slavic perspective.