Hechsher of the Orthodox Union | |
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Certifying agency | Kosher Division of Orthodox Union |
Founded | 1923 |
Headquarters | 40 Rector St, New York, NY 10006 |
Key People |
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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]