Karolina Gruszka (born 13 July 1980) is a Polish actress. She has appeared in more than 30 films and television shows since 1996. She was nominated for an award as Best Actress for her role in Kochankowie z Marony at the 2007 Polish Film Awards.

In 2019, she appeared in the Icelandic movie Gullregn (English: Goldrain), directed by Ragnar Bragason. Although she previously did not know the language, she had to perform all her lines in Icelandic