Oleksandr Vasylyovych Stadnik (; born 7 July 1977) is a Ukrainian civil servant and politician. He was Governor of Mykolaiv Oblast from September 2019 to November 2020.
In 2006 Stadnik graduated from the National Academy of Internal Affairs.
Stadnik is a lawyer by profession.
He worked at the Ministry of Revenues and Duties.
He also served at the State Fiscal Service in Kyiv.
In 2015, Stadnik ran for the Kyiv City Council.
Stadnik was appointed Governor of Mykolaiv Oblast on 18 September 2019. He was fired from this post on 17 November 2020.