John Haldane

• John Haldane (MP), MP for Scotland Scottish [representatives to the 1st Parliament of Great Britain|in the 1st Parliament of Great Britain]
• John Scott Haldane, British physiologist
• John Haldane (priest), Provost of Southwark
• John [Burdon Sanderson Haldane], British biologist
• John Haldane (philosopher), British philosopher