Natalia Ivanovna Sedova (Russian: Ната́лья Ива́новна Седо́ва; 5 April 1882, in Romny, Russian Empire – 23 January 1962, in Corbeil-Essonnes, Paris, France) is best known as the second wife of Leon Trotsky, the Russian revolutionary. She was also an active revolutionary and wrote on cultural matters pertaining to Marxism.