John Mansfield
John Mansfield may refer to:
- John Mansfield (Beverley MP), member for Beverley (UK [Parliament constituency)] in 1593
- John Mansfield (American politician), American soldier and politician
- John Mansfield (English politician), British trade unionist and politician
- Sir John Mansfield (Royal [Navy officer)], British admiral
- John Mansfield (footballer), English footballer
- John Mansfield (judge), Australian judge
- John Mansfield School, a school in the Dogsthorpe area of Peterborough, England, 1957–2007