Peter S. Kim (born April 27, 1958) is an American scientist. He was president of Merck Research Laboratories (MRL) 2003–2013 and is currently Virginia & D.K. Ludwig Professor of Biochemistry at Stanford University, Institute Scholar at Stanford ChEM-H, and Lead Investigator of the Infectious Disease Initiative at the Chan Zuckerberg Biohub. In 2016, Kim was elected a member of the National Academy of Engineering for leadership in the discovery and development of novel drugs and vaccines used worldwide.