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Contact us U.S. Merck corporate headquarters See all locations Our corporate headquarters is located at: 2000 Galloping Hill RoadKenilworth, NJ 07033 U.S.A. To reach a Merck employee, please call: 1-908-740-4000Monday – Friday, 8:30 am – 5:30 pm ET Worldwide offices To learn about our operations in Canada, visit www.merck.ca. For outside of the U.S. and Canada, … Continue reading Contact us