Junying Yuan (Chinese: 袁钧瑛; pinyin: Yuán Jūnyīng, born October 3, 1958) is the Elizabeth D. Hay Professor of Cell Biology at Harvard Medical School, best known for her work in cell death. Early in her career, she contributed significant findings to the discovery and characterization of apoptosis. More recently, she was responsible for the discovery of the programmed form of necrotic cell death known as necroptosis.