John Fitch may refer to:
John Fitch (computer scientist) (born 1945), computer scientist, mathematician and composer John Fitch (inventor) (1743–1798), early American inventor, built the first steamboat in the United States in 1786 John Fitch, Massachusetts settler for whom Fitchburg, Massachusetts is named John Fitch (racing driver) (1917–2012), racing driver, inventor of innovative safety devices and descendant of John Fitch (inventor) John A. Fitch (1881–1959), writer and professor of labor relations John H. Fitch, the eponym of YMCA Camp Fitch in Springfield, Pennsylvania John Knowles Fitch (1880–1943), founder of Fitch Ratings, Ltd John Nugent Fitch (1840–1927), botanical illustrator
See also Jon Fitch (born 1978), U.S. mixed martial arts fighter