Emmanuel Barthélemy (1823–1855) was a French revolutionary and a member of secret Blanquist societies during the reign of Louis-Phillipe, the citizen king of France in the July monarchy from 1830 until 1848. He fled to London in 1850. He is remembered for being the winner of the last fatal duel in England, fought in 1852 with another French exile. In 1855, he was hanged in London after killing two Englishmen.