John Warren may refer to:
Entertainment
Medicine
- John Warren (surgeon, born 1753) (1753âÂÂ1815), American surgeon during the Revolutionary War, founder of Harvard Medical School
- John Collins Warren (surgeon, born 1778) (1778âÂÂ1856), American surgeon, founder of the New England Journal of Medicine, son of the above
- John Collins Warren (surgeon, born 1842) (1842âÂÂ1927), American surgeon, son of Jonathan Mason Warren
- John Warren (anatomist, born 1874) (1874âÂÂ1928), American professor of anatomy at Harvard University, son of the above
- Robin Warren (John Robin Warren, 1937âÂÂ2024), Australian pathologist
Military
Politics
- John Warren (Dover MP) (died 1547), English member of Parliament for Dover
- John Warren (Upper Canada politician) (died 1832), merchant and politician in Upper Canada
- John Henry Warren (c. 1812âÂÂ1885), English-born merchant and politician in Newfoundland
- John Holden Warren (1825âÂÂ1901), Wisconsin state senator
- John Warren (Australian politician) (1830âÂÂ1914), Australian pastoralist and politician
- John E. Warren, Mayor of Saint Paul, Minnesota, from 1863 to 1864
- John Warren (Georgia politician) (fl. 1868), Georgia state representative
- John Warren (trade unionist) (1895âÂÂ1960), British trade unionist
Religion
Science and engineering
Sports
Others
See also
- Jonathan Mason Warren (1811âÂÂ1867), American surgeon, pioneer of plastic and reconstructive surgery, son of John Collins Warren