Stefan Michnik (['st?fan 'mix?ik] born 28 September 1929, in Drohobycz (at the time, part of the Second Polish Republic; now Drohobych, Ukraine), is a former Stalinist military judge of the Soviet-dominated regime in post-World War II Poland, and a former captain in the communist Polish People's Army.
He was involved in the politically-motivated arrest, trial, imprisonment and/or execution of a number Polish anti-communist fighters and activists.
Many of those persecuted by Michnik also fought against Nazi Germany during World War II, as members of the Polish resistance.After de-stalinization, Michnik went into exile in 1968, and has lived in Storvreta, Sweden.After the collapse of communism in Poland (1989), Michnik was formally implicated by the Polish justice system in zbrodnie komunistyczne ("communist crimes") relating to his tenure as a military judge.