Ya'akov Yechezkiya Greenwald (Hebrew: יעקב יחזקי' גרינוואלד.

Also called the "Vayaged Ya'akov", 1882 – c. 1 March 1941 (2 Adar 5701)) was the rabbi of the Etz Chaim community in Pápa, Hungary, and the rosh yeshiva there.

Greenwald was born in Csorna to Moshe Grunwald, rabbi and rosh yeshiva of Khust, and studied under his father until his marriage in 1900 to his cousin Sara Rivkah Brown.

In 1912 he was appointed rabbi of Deutschkreutz, replacing his uncle Eliezer David Greenwald.

Greenwald died in 1941 and was buried in the Jewish cemetery in Pápa, where he was succeeded by his son, Yosef Greenwald, as Rabbi of the Etz Chaim community in Pápa and as rosh yeshiva.