John Draper may refer to:
- John Draper (1943âÂÂ), American computer hacker and phone phreaker who used the pseudonym "Captain Crunch"
- John Christopher Draper (1835âÂÂ1885), American chemist, a son of John William Draper and brother of Henry Draper
- John William Draper (1811âÂÂ1882), American (English-born) scientist, philosopher, physician, chemist, historian and photographer
- John Draper (MP for New Shoreham), 1413âÂÂ1416, MP for New Shoreham (UK Parliament constituency)
- John Draper (MP for Rochester), in 1420, MP for Rochester (UK Parliament constituency)
- John Draper (motorcyclist) (1939âÂÂ2002), English professional motorcycle racer