Cline is a surname. Notable people with the surname include:
Catherine Ann Cline (1927–2005), American historian and authorCharles E. Cline, American politicianEdward Cline (b. 1946), American screenwriter and directorEric Cline (b. 1955), Canadian politicianEric H. Cline (b. 1960), American archaeologistErnest Cline (b. 1972), American comedian and screenwriterIsaac Cline (1861–1955), American meteorologistKristi Cline (b. 1980), Playboy playmateLeticia Cline (b. 1978), American model and wrestling personalityMaggie Cline, (1857–1923), Irish American vaudeville singerMartin Cline (b. 1934), American geneticistMelanie Cline (b. 1975), American BMX racerMelissa S. Cline, American biologistMonk Cline (1858–1916), American baseball playerNels Cline (b. 1956), American guitarist and composerOllie Cline (1925–2001), American football playerPatsy Cline (1932–1963), country music star (born Virginia Hensley)Russell Cline (born c. 1965), American currency trader and conmanSperry Cline (d. 1964), Canadian frontier policemanTy Cline (b. 1939), American baseball playerVictor Cline (born c. 1950), American psychoanalystReginald Cline-Cole (fl. c. 2000), Sierra Leonean professor of developmental geography