Oleksandr Serhiyovych Kozak (; born 25 July 1994) is a Ukrainian professional footballer who plays as a midfielder for Kudrivka.
In 2014, he signed his first professional contract with FC Metalurh Donetsk.
He made his debut for FC Metalurh Donetsk against FC Hoverla Uzhhorod on 23 May 2015 in the Ukrainian Premier League.