Jean Leguay (29 November 1909 – 5 July 1989) was second in command in the French National Police during the Nazi Occupation of France. He was complicit in the 1942 roundup of Jews in Paris and their deportation from France to Nazi extermination camps, which resulted in the deaths of thousands of people, both adults and children.
During the Vichy regime, Leguay was second-in-command to René Bousquet, general secretary of the National Police in Paris. He participated in organising the Vel' d'Hiv Roundup (Rafle du Vel' d'Hiv), the mass arrest of more than 13,000 Jews which took place on 16 and 17 July 1942 in Paris. They were deported to extermination camps in eastern Europe, where most were killed.
After the war, Leguay became president of Warner Lambert, Inc. of London. (It is now merged with Pfizer.) Later he became president of Substantia Laboratories in Paris.
In 1979 Leguay was charged with crimes against humanity for his role in the organisation of the Vel' d'Hiv Roundup (Rafle du Vel' d'Hiv), the mass arrest of more than 13,000 Jews on 16 and 17 July 1942 in Paris.
Leguay died of cancer in 1989. In a statement unprecedented in the history of French justice, the judiciary officially stated after his death that Leguay's involvement in crimes against humanity was ascertained beyond any doubt.