Petro Yuriiovych Mirchuk[a] (June 26, 1913 – May 16, 1999) was a Ukrainian writer living in the United States and a leading member of the Organization of Ukrainian Nationalists.

Mirchuk headed the OUN's propaganda apparatus in 1939.

[2] During World War II, he was imprisoned in Auschwitz, Mauthausen, and other concentration camps.

He entered the United States as a displaced person after the war.

[3] He authored several books about the OUN and UPA, and wrote the first biography of Stefan Bandera.