Nicolae Cajal (October 1, 1919, Bucharest – March 7, 2004) was a Romanian Jewish physician, academic, politician, and philanthropist. He was President of the Jewish Communities' Federation of Romania from 1994 to his death.
Cajal held a Ph.D. in virology and chaired the Ştefan S. Nicolau Virology Research Center in Bucharest for years. He was a member of the Romanian Academy, the Romanian Medical Sciences Academy, the British Royal Society of Medicine, and the New York Academy of Sciences. From 1966, he was an expert for the World Health Organization.
Nicolae Cajal was an active member in civil society, involved in improving awareness of war crimes carried in World War II Romania and of the genocide in Transnistria and other occupied areas (see Romania during World War II).
Between 1990 and 1992, he was an independent senator for Bucharest.