Ruthenian Orthodox Church

Ruthenian Orthodox Church may refer to:


 * an exonymic designation for Eastern Orthodox ecclesiastical jurisdictions among Eastern Slavs, during the late medieval and early modern periods, including:
 * the medieval and early modern Metropolis of Kiev and all Rus' (Eastern Orthodox)
 * the late medieval Metropolis of Halych (Eastern Orthodox)
 * the late medieval Metropolis of Lithuania (Eastern Orthodox)
 * Ruthenian Orthodox Church in Ukraine, an exonymic designation for early modern Eastern Orthodox Church, on the territory of Ukraine
 * Belarusian Orthodox Church, an exonymic designation for the semi-automomous church of the Russian Orthodox Church, on the territory of Belarus