John Stack
John Stack may refer to:
- John K. Stack Jr., Michigan Auditor General
- John M. Stack, American politician
- John F. Stack, American professor of politics, international relations, and law
- John Stack (politician), Irish nationalist politician, Member of Parliament for North Kerry 1885–1892
- John Stack (rower), American rower, gold medallist at the 1948 Summer Olympics
- John Stack (engineer), American aerospace engineer, won two Collier trophies