John Pratt
John Pratt may refer to:
- John Pratt (judge), Lord Chief Justice of England and interim Chancellor of the Exchequer
- John Pratt (soldier), United States Army officer
- John Pratt, 1st Marquess Camden, British politician
- John Pratt, 3rd Marquess Camden, British politician
- John Pratt, 4th Marquess Camden, British peer
- John Pratt (died 1835), hanged for sodomy
- John Pratt (archdeacon of Calcutta), British clergyman and mathematician, developer of the theory of isostasy
- John Pratt (cricketer), English cricketer
- John Teele Pratt, American corporate attorney, philanthropist, music impresario, and financier
- John Pratt (Liberal politician), Scottish Liberal politician
- John Lee Pratt, American businessman who served on GM's board of directors
- John Pratt (Canadian politician), Manitoban politician
- John H. Pratt, US Court of Appeals judge
- John Pratt (Provost of Southwell), Anglican archdeacon and provost
- John Winton or John Pratt, English naval officer, author and obituarist
- John W. Pratt, professor of statistics, economics, and business at Harvard University
- John Pratt (footballer), English footballer
- John Bridge Pratt, husband of Anna Bronson Alcott Pratt, the elder sister of novelist Louisa May Alcott
- John G. Pratt, Confederate general from Louisiana
- John M. Pratt, tax resistance leader, activist, publicist and newspaper man
- John S. Pratt, American Army drum instructor
- John Pratt (inventor), American journalist and newspaper editor
- John Pratt (archdeacon of St David's), Welsh Anglican priest