Contact us U.S. Merck corporate headquarters See all locations Our corporate headquarters is located at: 126 East Lincoln AvenueP.O. Box 2000Rahway, NJ 07065 USA 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. … Continue reading Contact us