Viktoriya Viktorivna Tkachuk (Ukrainian: Вікторія Вікторівна Ткачук; born 8 November 1994) is a Ukrainian athlete specialising in the 400 metres hurdles. She won the silver medal in the event at the 2022 European Athletics Championships. Tkachuk represented Ukraine at the 2016 Rio Olympics without advancing from the semi-finals, and at the 2020 Tokyo Olympics, where she placed sixth in the final. Her personal best in the 400 metres hurdles is 53.76 seconds, set in 2021 in Zürich.