Viktoriya Tkachuk (Ukrainian: ???????? ??????; born 8 November 1994) is a Ukrainian athlete specialising in the 400 metres hurdles.
She represented her country at the 2015 World Championships in Athletics in Beijing without advancing from the first round, and at the 2016 Olympics, where she qualified to the semifinals on 15 August 2016.
Her personal best in the event is 55.96 seconds set in Lutsk in 2016.