Katarzyna Anna Lubnauer (née Libudzisz; born 24 July 1969) is a Polish politician, feminist, mathematician and academic teacher.

[2] She was born Katarzyna Libudzisz on 24 July 1969 in Łódź to mother Zdzisława, a professor of microbiology and father Jerzy, a chemist.

She briefly worked as a school teacher before she decided to continue her studies at the University of Łódź where she became a lecturer at the Faculty of Mathematics.

She obtained her PhD degree in mathematics in 2001 after she wrote her doctoral dissertation entitled Limit Theorems in Quantum Probability.

[10] In 2023, following the parliamentary election, she assumed the post of State Secretary in the Ministry of National Education in the Third Cabinet of Donald Tusk.

[14] In July 2024, in an official position at Ministry of Education, she said in a radio interview that "in other countries, parents who leave with their kids for vacation during a school year can be detained at airports" and suggested that a similar measure could be introduced in Poland.