Jacques Ancel (22 July 1879 in Parmain, Val-d'Oise – 1943 Alloue Charente) was a French geographer and geopolitician.
Wounded three times, he was detached to the Headquarters of the French Army's Oriental Corps (fighting in the Ottoman Empire and the Balkans).
In 1930, Ancel obtained his doctorate with the thesis La Macédoine, étude de colonisation contemporaine ("Macedonia, a study in contemporary colonization").
He taught at the University of Paris' Institute of Higher International Studies, and was a corresponding member of the Romanian Academy and of other scientific forums.
Ancel was imprisoned in Drancy and Royallieu-Compiègne internment camps during World War II due to his Jewish background.