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.
Milongo completed his primary and secondary schooling in Brazzaville before pursuing a Master's Degree in Law from the University of Nancy. He then went on to study at the prestigious École Nationale d'Administration (ÉNA) in Paris, graduating in 1964. Notably, this year is also known as the "Blaise Pascal generation" at ÉNA.