Louis Marie de Bourbon, Duke of Rambouillet (2 January 1746 – 13 November 1749) was a French prince who died before his fourth birthday. He was never in the line of succession to the France's throne because he belonged to the illegitimate Bourbon-Penthièvre branch of the royal dynasty through the liaison of Louis XIV with a mistress. He was known as the Duc de Rambouillet.