Joanna Olczak-Ronikier (born 12 November 1934) is a Polish writer[1] and scenarist, co-founder of the Piwnica pod Baranami cabaret in Kraków.

Her maternal grandmother Janina de domo Horwitz (1875–1960) also was a writer, while her husband Jakób Mortkowicz (1876–1931) was a book publisher.

[2] Joanna Olczak-Ronikier is also related with Maksymilian Horwitz, a politician, and Kamilla Kancewicz, a doctor.

In 1994 she wrote a monograph about Piwnica pod Baranami and four years later a biography of Piotr Skrzynecki, founder of this cabaret.

In 2002 her memoir about her family's history W ogrodzie pamięci won the Nike Award and in 2011 she received the Klio Award for Janusz Korczak biography, Korczak.