John Dalton (1766–1844) was a scientist who pioneered modern atomic theory.
John Dalton may also refer to:
- John Dalton (American football) (1889–1919), American football player for Navy
- John Dalton (architect) (1927-2007), Australian architect
- John Dalton (author), American author
- John Dalton (bishop) (c. 1821–1869), Roman Catholic bishop
- John Dalton (divine) (1814–1874), Catholic divine
- John Dalton (musician) (born 1943), former member of The Kinks
- John Dalton (soldier) (died 1981), British Army Major-General and father of Richard Dalton
- John Call Dalton (1825–1889), American physiologist
- John Howard Dalton (born 1941), US Secretary of the Navy
- John M. Dalton (1900–1972), Governor of Missouri
- John N. Dalton (1931–1986), Governor of Virginia from 1978 to 1982
- John Neale Dalton (1839–1931), Royal chaplain and tutor
- John Dalton (MP) (1610–1679), English politician who sat in the House of Commons between 1659 and 1679
- John Dalton (hurler) (born 1985), Irish hurler
- John Dalton (poet) (1709–1763), English cleric and poet
See also
- John D'Alton (1882–1963) Roman Catholic Cardinal and Archbishop of Armagh
- John D'Alton (historian) (1792–1867), Irish lawyer and genealogist
- John D'Alton (engineer) (1829-1904), Australian engineer
- Jon Dalton (born 1974), former Survivor contestant
- Jack Dalton (disambiguation)