Materials of the All-Russian Scientific Conference "Cossacks of Russia in Riots, Troubles and Revolutions (to the centenary of the events of 1917)" are devoted to the problems of the participation of Cossacks in the Russian Troubles and in the formation of Russian statehood, in the popular movements of the 17th-18th centuries. (uprisings of I. Bolotnikov, S. Razin, K. Bulavin, E. Pugachev, F. Sukhorukov), in the revolutionary events of 1905-1907; factors and reasons for anti-revolutionary sentiments in Cossack society after the events of October 1917; interaction of the Cossacks of Russia with the White movement during the Civil War; changing the way of life of Cossack communities after the end of the Civil War; Cossack movement during the "late" perestroika and in the post-Soviet period.