Joslyn is a surname. Notable people with the surname include:Allyn Joslyn (1901–1981), American stage, film and television actor Betsy Joslyn, Broadway musical and dramatic actress and soprano Cliff Joslyn, American information systems scientist Frank Joslyn Baum (1883–1958), lawyer, soldier, writer, and film producer Hezekiah Joslyn, American abolitionist Joslyn Hoyte-Smith, former British 400m athlete Lewis Joslyn, American politician Marcellus L. Joslyn (1873–1963), founder of the Joslyn Manufacturing and Supply Company, a Chicago, Illinois electrical supply firm Matilda Joslyn Gage (1826–1898), suffragist, Native American activist, abolitionist, freethinker, and prolific author Maynard A. Joslyn (1904–1984), Russian-born American food scientist in the rebirth of the California wine industry after 1933 Steve Joslyn, American college baseball coach
