Marie Clare McCormick (born 1946) is an American pediatrician and Sumner and Esther Feldberg Professor of Maternal and Child Health in the Department of Social and Behavioral Sciences at Harvard T.H. Chan School of Public Health in Boston, Massachusetts. She also holds an appointment as professor of pediatrics in the Harvard Medical School. In addition, she is the senior associate for academic affairs in the department of neonatology at the Beth Israel Deaconess Medical Center. Her research primarily focused on epidemiology and health services, particularly in relation to infant mortality and the outcomes of very low birthweight (VLBW) and otherwise high-risk neonates.