Marie François Rouyer (2 March 1765 – 10 August 1824) was a French general during the Napoleonic Wars. In 1783 he joined the army of a German state and became a lieutenant of dragoons within three years. In 1791 he joined the French army as an infantry captain. He fought in the French Revolutionary Wars, becoming an Adjutant General Chef de brigade (colonel) on 12 April 1794. He won promotion to general of brigade on 30 July 1799. Napoleon Bonaparte named him a commander of the Légion d'Honneur on 14 June 1804.