Satmar is a Hasidic group founded in 1905 by Grand Rebbe Joel Teitelbaum, in the city of Szatmárnémeti, Hungary. The group is an offshoot of the Sighet Hasidic dynasty. Following World War II, it was re-established in New York.

Hasidism, sometimes spelled Chassidism, and also known as Hasidic Judaism, is a religious movement within Judaism that arose as a spiritual revival movement in Poland and contemporary Western Ukraine, during the 18th century, and spread rapidly throughout Eastern Europe. Today, most of those affiliated with the movement, known as hassidim, reside in Israel and in the United States.