Merlin is a surname. Notable people with the surname include:
Antoine Christophe Merlin (1762–1833), also known as Merlin de Thionville, French politician
Christophe Antoine Merlin (1771–1839), French cavalry general in the Napoleonic Wars
Dino Merlin (born 1962), Bosnian musician
Jean-Claude Merlin (born 1954), French astronomer
John Joseph Merlin (1735–1803), Belgian inventor and horologist
Laurent Merlin (born 1984), French footballer
Philippe-Antoine Merlin de Douai (1754–1838) French politician and lawyer
Roberto Merlin, Argentine physicist
Serge Merlin (active from 1960s), French actor
Shmuel Merlin (1910–1994), Zionist activist, Irgun member and Israeli politician
Sidney Merlin (1856–1952), Greek botanist and sports shooter
