Vladimir Mikhailovich Zenzinov (Russian: ???????? ?????????? ????????; historically, his surname was also transcribed as Sensinoff: 29 November 1880 — 20 October 1953) was a member of Russia's Socialist-Revolutionary Party, a participant of the First (1905), Second (February 1917), and Third (November 1917) Russian Revolutions, and an author of a number of books.