Maryna Oleksandrivna Bekh (Ukrainian: Марина Олександрівна Бех; born 18 July 1995 in Khmelnytskyi Oblast) is a Ukrainian long jumper. She won the silver medal at the 2018 European Championships. She finished fifth at the 2011 World Youth Championships, eighth at the 2012 World Junior Championships, won the bronze medal at the 2013 European Junior Championships and finished ninth at the 2014 World Junior Championships. She competed at the 2013 World Championships without reaching the final. Her personal best jump is 6.78 metres, achieved in June 2013 in Yalta.