| Born | March 15, 1861 Tver |
|---|---|
| Died | March 19, 1938 (aged 77) Moscow |
| Nationality | Russian |
| Occupation | Organic chemist |
| Known for | Demjanov rearrangement |
Nikolay Yakovlevich Demyanov (Russian: Никола́й Я́ковлевич Демья́нов; March 27 [O.S. March 15] 1861, Tver—March 19, 1938, Moscow), also known as Demjanov and Demjanow, was a Soviet/Russian organic chemist, member of the USSR Academy of Sciences (1929), internationally known for the Demjanov rearrangement organic reaction and other discoveries.
He was a recipient of Lenin Prize in 1930.