Yekusiel Yehudah Halberstam (January 10, 1905 – June 18, 1994) was a rebbe (hereditary rabbinical leader) of the Hasidic dynasty of Sanz-Klausenburg.

He was a great-grandson (in the direct male line) of Chaim Halberstam, founder of the Sanz hasidic dynasty.

On 19 March 1944, the Germans invaded Hungary and Hungarian Jews were confined to ghettos and then deported to the Auschwitz death camp.

The Klausenburg ghetto was established on 1 May 1944, and was liquidated via six transports to Auschwitz between late May and early June.

Halberstam was assigned to a work unit in the Warsaw Ghetto and later was sent to the Dachau concentration camp as a slave laborer, and then to the Muldorf Forest, where the Nazis were building an underground airport and missile batteries.

In the spring of 1945 the Germans disbanded the Muldorf camp and sent the inmates on a death march from which the survivors, including Halberstam, were liberated by Allied troops in late April.