John Moss may refer to:
- John Moss (lawyer) (1890–1976), British social services worker
- John Moss (Philadelphia) (1771–1847), Philadelphia merchant, Parnas (President) of Congregation Mikveh Israel involved in the Damascus Affair
- John Moss (umpire) (1864–1950), English cricket umpire
- John C. Moss (1838–1892), American inventor
- John E. Moss (1915–1997), U.S. Representative from California
- John Francis Moss (1844-1907), Sheffield education pioneer
- John Errington Moss (born 1940), Canadian author
- John Henry Moss (1918–2009), American baseball executive and politician
- John Thomas Moss (1839–1880), American frontiersman, prospector, and miner
- Johnny Moss (1907–1995), American poker player
- Jon Moss (born 1957), British rock drummer
- J. McKenzie Moss (1868–1929), American politician and judge