List of Famous people born in Île-de-France, France

Étienne Geoffroy Saint-Hilaire was a French naturalist who established the principle of "unity of composition". He was a colleague of Jean-Baptiste Lamarck and expanded and defended Lamarck's evolutionary theories. Geoffroy's scientific views had a transcendental flavor and were similar to those of German morphologists like Lorenz Oken. He believed in the underlying unity of organismal design, and the possibility of the transmutation of species in time, amassing evidence for his claims through research in comparative anatomy, paleontology, and embryology.

César Henri Guillaume de La Luzerne, seigneur de Beuzeville et de Rilly, baron de Chambon, was a French politician and soldier, rising to Lieutenant général des armées and naval minister. He was the son of César-Antoine de La Luzerne, comte de Beuzeville and Marie-Elisabeth de Lamoignon de Blancmesnil (1716-1758).

Claire Berest is a French writer. Her partner is lawyer and writer, Abel Quentin.

Frédéric Passy was a French economist and pacifist who was a founding member of several peace societies and the Inter-Parliamentary Union. He was also an author and politician, sitting in the Chamber of Deputies from 1881 until 1889. He was a joint winner of the Nobel Peace Prize in 1901 for his work in the European peace movement.

Christopher Six is a French equestrian. He competed in the individual eventing at the 2020 Summer Olympics.

Marc Julia was a French chemist and the winner of the 1990 CNRS Gold Medal in chemistry. He discovered the Julia olefination reaction in 1973.

Alphonse-Louis du Plessis de Richelieu (1582–1653) was a French Carthusian, bishop and Cardinal. He was the elder brother of Armand Cardinal Richelieu, the celebrated minister of Louis XIII.