Maryna Oleksandrivna Bekh-Romanchuk (Ukrainian: Мари́на Олександрівна Бех Романчу́к; born 18 July 1995) is a Ukrainian long jumper and triple jumper.

She won the silver medal at the 2019 World Championships in the long jump and the silver medal at the 2023 World Championships in the triple jump.

[1] Her personal best jump is 6.93 metres, achieved in Lutsk in 2016.

In 2018, she married Ukrainian Swimmer Mykhailo Romanchuk.

This biographical article relating to Ukrainian athletics is a stub.