Ukrainian Orthodox Church

The History of Christianity in Ukraine dates back to the earliest centuries of the apostolic church. It has remained the dominant religion in the country since its acceptance in 988 by Vladimir the Great (Volodymyr the Great), who instated it as the state religion of Kievan Rus', a medieval East Slavic state and establishment of the Kiev Metropolis.

Although separated into various denominations, most Ukrainian Christians share a common faith, based on the Eastern Christian tradition. This tradition is represented in Ukraine by both Eastern Orthodox and Eastern Catholic Churches, which have been at various historic times closely aligned with Ukrainian national self-identity.

Currently, three major Ukrainian Orthodox Churches coexist, and often compete, in the country: the Ukrainian Orthodox Church of the Kyivan Patriarchate, the Ukrainian Orthodox Church (Moscow Patriarchate), and the . Additionally, a significant body of Christians belong to the Eastern Rite Ukrainian Greek Catholic Church, and a smaller number are in the Ruthenian Catholic Church. While Western Christian traditions such as Roman Catholicism and Protestantism have had a limited presence on the territory of Ukraine since at least the 16th century, worshipers of these traditions remain a relatively small minority in today's Ukraine.