Merlin is a surname. Notable people with the surname include:
Albert Merlin (1931–2015), French economist and vice-president of the "Presaje" institute Alessandra Merlin (born 1975), retired Italian alpine skier Alfred Merlin (1876–1965), French historian and archaeologist André Merlin (1911–1960), French tennis player Antoine Christophe Merlin (1762–1833), also known as Merlin de Thionville, French politician Antoine François Eugène Merlin (1778–1854), French soldier and general Arnaud Merlin (born 1963), French jazz critic, music journalist and radio producer Christian Merlin (born 1964), French contemporary music critic and musicologist Christine Merlin (born 1980), French chronobiologist and an associate professor of biology Christophe Antoine Merlin (1771–1839), French cavalry general in the Napoleonic Wars Dino Merlin (born 1962), Bosnian musician Émile Merlin (1875–1938), Belgian mathematician and astronomer Ernest Merlin (1886–1959), British cyclist Gerald Merlin (1884–1945), British sports shooter Henry Beaufoy Merlin (1830–1873), Australian photographer, showman, illusionist and illustrator Jacques Merlin (1480–1541), French theologian and book editor Jan Merlin (1925–2019), American character actor, television writer, and author Jean-Claude Merlin (born 1954), French astronomer Joanna Merlin (1931–2023), American actress and casting director John Joseph Merlin (1735–1803), Belgian inventor and horologist Kristen Merlin (born 1984), American country singer Laurent Merlin (born 1984), French footballer Lina Merlin (1887–1979), Italian politician Martial Henri Merlin (1860–1935), French colonial administrator Pierre Merlin (1918–2000), French artist and jazz musician Pierre Merlin (geographer) (1937–2026), French geographer Philippe-Antoine Merlin de Douai (1754–1838) French politician and lawyer Quentin Merlin (born 2002), French footballer Renzo Merlin (1923–2003), Italian professional football player Roberto Merlin, Argentine physicist Serge Merlin (1933–2019), French actor Shmuel Merlin (1910–1994), Zionist activist, Irgun member and Israeli politician Sidney Merlin (1856–1952), Greek botanist and sports shooter Umberto Merlin (1885–1964), Italian lawyer and politician