Sigmund Sobolewski (Polish pronunciation: ['z?gmunt s?b?'l?(f)sk?i], Zygmunt Sobolewski; May 11, 1923 – August 7, 2017) was a Polish Catholic Holocaust survivor and activist.
He was the 88th prisoner to enter Auschwitz on the first transport to the concentration camp on June 14, 1940, and remained a prisoner for four and a half years during World War II.
He was an opponent of Holocaust denial and was notable as a non-Jewish victim and witness who confronted neo-Nazis, antisemites and Holocaust deniers.
His life and memories as a survivor are recounted in Prisoner 88: The Man in Stripes by Rabbi Roy Tanenbaum.