Rozka or Ruzka Korczak (1921, Płock – 1988) was a Polish Jewish partisan leader during World War II. She served in the United Partisan Organization (Fareynikte Partizaner Organizatsye) and, alongside Vitka Kempner and founder Abba Kovner, assumed a leadership role[citation needed] in its successor group, the Avengers (Nokmim)--the only known undefeated ghetto uprising in the history of the Holocaust.