Yosef Greenwald (Hebrew: יוסף גרינוואלד; 1903 – Brooklyn 1984) was the second Rebbe of the Pupa Hasidic dynasty.

After the war he moved to Williamsburg, Brooklyn, and established the contemporary Pupa Hasidic movement.

[3] After his father's death in 1941, Greenwald moved to Papa, Hungary, and began to serve as rabbi and Rosh Yeshivah.

He brought additional students from Satmar to study in the yeshiva, and hid some sixty young men who fled from Slovakia and Poland.

He moved c. 1946 with the yeshiva, at that time numbering approximately 60 young men, to Szombathely, Hungary.