During the Napoleonic Wars, Champollion was a young bachelor and thus liable to compulsory military service, which would have put him in great danger due to the extremely high mortality of soldiers in Napoleon's armies.
Champollion married Rosine Blanc (1794-1871) in 1818 after four years of engagement, they had one daughter, Zoraïde Chéronnet-Champollion (1824-89).