The I Cavalry Corps of the Grande Armée was a French military unit that existed during the Napoleonic Wars.

At that time, Marshal Joachim Murat took command of the short-lived I Cavalry Corps before resuming leadership over Napoleon's Reserve Cavalry when the experiment ended.

The I Cavalry Corps was not recreated until 1812 for the invasion of Russia when command was exercised by General Étienne Marie Antoine Champion de Nansouty.

After being destroyed during the retreat from Russia, the I Cavalry Corps was reconstituted in 1813 and General Victor de Fay de La Tour-Maubourg was appointed to lead it.

At Leipzig, the corp took part in Murat's great charge, Latour-Maubourg was seriously wounded at the battle and replaced by General Jean-Pierre Doumerc who led the corps for the remainder of the War of the Sixth Coalition which ended with Napoleon's abdication in 1814.