Jean Gagé (1 June 1902 – 4 May 1986) was a French historian who specialised in ancient Roman history.
From 1921 to 1924, Jean Gagé was a student at the École normale supérieure in Paris and obtained his agrégation de lettres.
He was a member of the École française de Rome from 1925 until 1928, years in which he participated in excavations in Algeria.
He was sent to a teaching assignment in São Paulo, where he remained during World War II.
In 1955, he defended his thesis at the Sorbonne, then was appointed a professor at the Collège de France, succeeding André Piganiol as the chair of Roman civilisation, where he taught until 1972.