This article is devoted to an analysis of institutional changes in religious administration of Muslims of the former Russian Empire during 1917 and early 1918. Its focus is the Muslim clergy and the Tatar population inhabiting European Russia, the Volga‑Ural region, and Siberia that were under the jurisdiction of the Orenburg Muslim Spiritual Assembly. The Muslim congresses (including the first Turco‑Tatar national parliament, the Millät Mäjlise), as well as the Tatar‑language press, discussed a variety of key social and political issues.