Nina Demme (Russian: Нина Петровна Демме, 1902– 16 March 1977) was a Russian polar explorer, biologist, and ornithologist. She was one of the first women to explore the Arctic and have charge of a polar expedition. Raised in an polyamorous household in Kostroma, she attended the first women's gymnasium in Russia from 1907 to 1914 and then studied to become a teacher. After taking workers courses under Lenin's wife Nadezhda Krupskaya, she taught collectivism in the Ufa Governorate before settling in Leningrad in 1921 to study at the Geographical Institute. For eight years, she studied geography and biology, participating in numerous field trips on polar research.