Orthodox Union Kosher

Hechsher of the Orthodox Union
Certifying agency	Kosher Division of Orthodox Union
Founded	1923
Headquarters	40 Rector St, New York, NY 10006
Key People	Rabbi Menachem Genack (CEO) Rabbi Moshe Elefant (COO / Executive Rabbinic Coordinator) Rabbi Yaakov Luban (Executive Rabbinic Coordinator)
Website	oukosher.org

Orthodox Union Kosher, known as OU Kosher or OUK, is a kosher certification agency based in New York City. It was founded in 1923 by Abraham Goldstein. It is the certification agency of about 70% of kosher food worldwide, and is the largest of the "Big Five" major certification agencies, which include OK, Kof-K, Star-K, and CRC.^[1]