 After his primary and secondary schooling in Brazzaville, Milongo earned a Master's Degree in Law at the University of Nancy, after which he studied at the "École Nationale d'Administration" (ÉNA) in Paris, graduating in 1964.That year is also known as the ""Blaise Pascal generation"" at ÉNA.He was among only four Congolese citizens to have graduated from ÉNA.