Jan Pietrzak (pronounced [ˈjan ˈpʲɛtʃak]; born 26 April 1937) is a Polish satirist, singer-songwriter, stage and film actor, and columnist for Tygodnik Solidarność (Solidarity Weekly).

Pietrzak was in Warsaw, with Jonasz Kofta, when he co-founded the student cabaret club Hybrydy, which operated in 1962–67.

In 1967 Pietrzak founded Pod Egidą ("Under the Aegis"), a subversive Warsaw literary cabaret.

In February 2024 he was called to The Prosecutor Office in Warsaw in connection with his jokes concerning the compulsory distribution and settlement of the illegal immigrants in Poland.

In 1979, the authorities of the PRL – Polish People's Republic awarded Pietrzak with the Golden Cross of Merit.