Rostyslav Mykolayovych Lyakh (; born 12 October 2000) is a Ukrainian professional footballer who plays as a midfielder for Rukh Lviv.
Lyakh is a product of the FC Karpaty Lviv School Sportive System.
He made his debut for FC Karpaty as a substitute in the derby match against FC Lviv on 19 October 2019 in the Ukrainian Premier League.