Abstract: The subject of the study is information about the servants of the Muslim cult of the Tobolsk province in the late 90s of the XIX century - the 20s of the XX century, contained in various archival sources: Muslim metric books in the Old Tatar language, the First general census of the Russian Empire in 1897, documents (charter, protocols of the founders, lists of members and inventory of property Mohammedan religious communities, an agreement on the use of a Mohammedan liturgical building, minutes of general meetings, lists of parishioners, etc.) of Mohammedan religious communities for the 20s (Ishtama yurts, Komarov yurts, Medyan yurts, Mirim Yurts, Sabanak yurts, Sauskansky yurts, Suklem yurts, Escalba yurts). The purpose of the research is to study the composition of the Islamic clergy by introducing little-studied sources into scientific circulation. When studying the composition of the servants of the Muslim cult of the Tobolsk province in the late 1890s - 1920s, such scientific methods as historiographical analysis, comparative historical method, and source analysis were used. The novelty of the research is seen in the involvement of poorly studied sources in Russian and Tatar languages and in the systematization of disparate materials about Muslim clerics according to the chronological principle. An analysis of archival documents on the servants of the Muslim cult of the Tobolsk province in the late 1890s - 1920s showed that priests previously approved in the spiritual rank continued to serve in the Mohammedan religious communities organized in the early 1920s. Moreover, in the early years of Soviet power (up to 1925), new persons were appointed to various positions – imam, imam-khatib, mugallim, mullah, muezzin. It has been established that in the Soviet period, continuity in the service of a religious cult by blood relationship continues to be traced. Some ministers of the cult did not cease to indicate their ethnic origin, namely Bukhara. The author has revealed variability in the spelling of personal names of priests, which is associated with the formation of linguistic norms concerning the spelling of anthroponyms of the Tatar population: fused, separate, semi-alphabetic (hyphenated).