Kim Allan Williams Sr. (born 1955) is an American cardiologist. He is a Fellow of the American College of Cardiology and served as its president 2015–2016. He is currently a trustee of the organization.
Williams graduated from the University of Chicago in 1975 and the Pritzker School of Medicine at the University of Chicago in 1979. He has board certifications in internal medicine, cardiovascular diseases, nuclear medicine, nuclear cardiology, and cardiovascular computed tomography. He has served on the faculty of the Pritzker School of Medicine, the Wayne State University School of Medicine in Detroit, Michigan, and since 2013 at Rush University Medical Center in Chicago, where he is the head of the cardiology department.
Williams has served as president of the American Society of Nuclear Cardiology, chairman of the Coalition of Cardiovascular Organizations, and chairman of the board of the Association of Black Cardiologists, among other positions.