Olesya Mamchich, also spelled Mamchych (born 1981) is a Ukrainian poet and children's writer.

[1] She completed studies in creative writing at the Taras Shevchenko National University of Kyiv.

[2] Her poems for children are taught as part of Ukrainian elementary school curriculum.

[1] Her works have been translated into English, Polish, Belarusian, Georgian, Romanian, Russian, Lithuanian, Latvian and Hebrew.

[1] In 2022, she received the Lesya Ukrainka Award in the Literary Works for Children and Youth category.