Kashau (קאשוי) (also often spelled, as pronounced by most Ashkenazic Jews, Kasho) is a hasidic dynasty, named after its origin from Kassa (Košice). It was led till December 2018 by Grand Rabbi Eleizer Chaim Blum. Kashau institutions are presently located in Williamsburg, Monsey, and Bedford Hills in New York State. Followers of the Kashau Rebbe live in other Jewish centers around the world.