Oleksandra Serhiivna Gridasova (; born 5 July 1995) is a Ukrainian female rhythmic gymnast. Gridasova competed alongside London 2012 Olympians Olena Dmytrash, Yevgeniya Gomon, Valeriia Gudym, and rookie Anastasiya Voznyak at the 2016 Summer Olympics in Rio de Janeiro, where she and her Ukrainian team placed seventh in the group all-around final with a total score of 34.282.