Kostiantyn Sytnyk
Chairman of the Supreme Soviet of the Ukrainian SSR
In office 1980–1985
Preceded by	Mykhailo Bilyi
Succeeded by	Platon Kostiuk
Director of the Botanic Institute (NANU)
In office 1970–2003
Preceded by	Alfred Oksner
Succeeded by	Yakiv Didukh
Personal details
Born	Kostiantyn Merkuriyovych Sytnyk (1926-06-03)3 June 1926 Luhanske, Luhansk Okruha, Ukrainian SSR, USSR
Died	22 July 2017(2017-07-22) (aged 91) Kyiv, Ukraine
Political party	Ukrainian Platform "Sobor"
Other political affiliations	All-Union Communist Party (bolsheviks) (1982–90) People's Democratic Party (1996–99)

Kostiantyn Merkuriyovych Sytnyk (Ukrainian: Костянтин Меркурійович Ситник; 3 June 1926 – 22 July 2017) was a Ukrainian and Soviet scientist and academician, a member of the National Academy of Sciences of Ukraine who in 1970-2003 was director of the Botanic Institute of the National Academy of Sciences of Ukraine. Sytnyk also worked as a politician, and served as the Chairman of the Verkhovna Rada of the Ukrainian Soviet Socialist Republic from 1980 to 1985.

Sytnyk was born in Luhansk.

• Profile at the NANU Botanic Institute
• Full biography