McClellan is a surname. Notable people with the surname include:
Barr McClellan, Texas lawyer and author, father of Mark and Scott McClellan
Brian McClellan, American writer of fantasy
C. M. S. McLellan (1865–1916), American playwright and composer, also wrote as Hugh Morton
Edwin North McClellan (1881–1971), United States Marine Corps officer, author, and historian
George McClellan (physician) (1796–1847), surgeon and founder of Jefferson Medical College in Philadelphia, Pennsylvania
George McClellan (New York) (1856–1927), U.S. Representative from New York
George McClellan (RCMP commissioner) (1908–1982), Commissioner of the Royal Canadian Mounted Police
George B. McClellan (1826–1885), American Civil War general and creator of the Army of the Potomac
George Brinton McClellan, Jr. (1865–1940), Mayor of New York City and U.S. Representative from New York
James E. McClellan (1926-2016), American veterinarian and politician
James H. McClellan, mathematician and electronic engineer, professor at Georgia Institute of Technology
John McClellan (chemist), 19th-century English chemist and industrialist
John Little McClellan (1896–1977), U.S. Senator from Arkansas
Mark McClellan, Medicare and FDA official
Peter McClellan, Australian jurist
Robert McClellan (1806–1860), U.S. Representative from New York
Robert McClellan (New York treasurer), treasurer of New York state
Robert H. McClellan (1823–1902), Illinois state senator
Samuel McClellan (1730–1807), Brigadier General in the American Revolutionary War
Scott McClellan, former White House press secretary
Stephen T. McClellan, Wall Street analyst, author
Fictional characters:
Clarisse McClellan, a character in Fahrenheit 451 by Ray Bradbury
