Serhiy Rafailovych Hrynevetsky (Ukrainian: Сергій Рафаїлович Гриневецький, born 25 September 1957) is a Ukrainian politician who served as the Governor of Odesa Oblast, first from 1998 to 2005, and again from 27 November 2020 to 1 March 2022 following his appointment by President Volodymyr Zelensky.

On 27 February 1985, Hrynevetsky graduated from the Ukrainian Order of the Red Banner of Labor Agricultural Academy.

From 1982 to 1984, Hrynevetsky the First Secretary of the Rozdilnianski district committee of the Leninist Communist League of the Youth of Ukraine of Odesa Oblast.

From 1986 to 1990, he served as the First Secretary of the Odesa Regional Committee of the Young Communist League of Ukraine.

From 1990 to 1991, he went back to Rozdilnianski district as the regional secretary of the Communist Party of Ukraine, Odesa Oblast.