Juliusz Słowacki Polish Grammar School is a Polish grammar school (gymnasium) in the town of Czeski Cieszyn (Český Těšín), in the Zaolzie region of the Czech Republic. It is the only Polish secondary school in the country, serving the educational purposes of the Polish minority in the Czech Republic.

The school was founded in 1909 in the town of Orłowa (Orlová) as the second (and up to 1938 the only) Polish secondary school on the territory of Zaolzie.