Philippe Alegambe SJ (22 January 1592, Brussels, Belgium – 6 September 1652, Rome, Italy) was a Belgian Jesuit priest and bibliographer.
After completing High School studies in Brussels, Alegambe went to Spain, in the service of the Duke of Osuna.
After ordination to the priesthood (1621) Alegambe was sent to teach Philosophy and Theology at Graz, Austria, and for three years traveled through Europe (France, Spain, Italy), as preceptor of the Prince of Eggenberg's son.
In 1638 he was again on the road: he accompanies the young prince to Rome, as part of an embassy sent by the Emperor to pope Urban VIII.
At the end of the mission Alegambe is retained in Rome by Mutius Vitelleschi, Superior General of the Society of Jesus, to become his Latin secretary.