John Mactaggart

John Mactaggart may refer to:


 * John Mactaggart (1791-1830), Scottish author and engineer
 * Sir John Mactaggart, 1st Baronet (1867–1956)
 * Sir John Auld Mactaggart, 2nd Baronet (1898–1960), of the Mactaggart baronets
 * Sir Ian Auld Mactaggart, 3rd Baronet (1923–1987), of the Mactaggart baronets
 * Sir John Auld Mactaggart, 4th Baronet (born 1951), Scottish entrepreneur and philanthropist
 * John Mactaggart of Kilkivan, Queensland