Louis-Joseph-Narcisse Marchand (born Paris, March 28, 1791, died Trouville, June 19, 1876) was Napoleon Bonaparte's valet and the nominated liquidator of his succession.

Born into a middle-class family from the Eure-et-Loir department, in 1811 he became an Imperial servant.

He remained faithful to Napoleon after the first abdication and was selected to replace the Emperor's main valet who had fled.

After the death of Napoleon I, Marchand returned to France where he married in 1823; he took part in the Retour des cendres (Return of the [Napoleon's] ashes) in 1840.

His memoirs have been helpful to historians, though the facts described were not written with impartiality and dispassion.