Periodicals significantly enrich the source base of the history of the Protestant movement in Ukraine. As part of the study periodicals of the parish and monastic clergy are analyzed by archdioceses, informative potential is characterized, the data on manifestations of Protestantism in the Ukrainian provinces are teased out including in Volynska, Katerynoslavska, Kyivska, Poltavska, Kharkavska, Khersonska. The chronological frameworks of the study are responsible for the events of the revolutionary wave of 1905-1907, which became a certain catalyst for social tension and changes in the religious outlook of Ukrainians and the outbreak of І World War. The weakening of social stability determined the Protestants to cohesion and strengthen of their ideological movement. The methodological foundation is based on the principle of historicism and objectivity. The method of source analysis, method of analysis and synthesis, in particular, thematic and structural types of content analysis are used in the research. The eparchial periodicals of the selected period are significant part of the source base of the study of religious life in the Ukrainian area, which illustrate the theoretical basis of the Protestant movement. The relevance of this study is due to: firstly, the need to cover the eparchial journal as a source of the history of the Protestant movement in Ukraine, since they contain important factual material; secondly, the disclosure of the informative potential of this journal will provide grounds for the creation of new research topics; and, thirdly, in the wake of a renewed scientific interest in religious issues in recent years, need to explore the attitude of Russian state authorities to Protestantism, policy on manifestations and the spread of the Protestant dogma. The sources, which were analyzed, give meaningful information about the Protestant centers in the Ukrainian territory, reflect the general opinion of governmental bodies, officials and clergy on the activities of the Protestants in the period 1907-1914, and analyze their participation in the process of changes of social and political life, which caused by the revolutionary events in the Russian Empire.