John Mactaggart
John Mactaggart or McTaggart may refer to:
- Sir John McTaggart, 1st Baronet, Scottish Liberal MP in the British Parliament
- John Mactaggart , Scottish author and engineer
- John MacTaggart, early settler of Kilkivan, Queensland
- J. M. E. McTaggart, English idealist metaphysician
- Sir John Mactaggart, 1st Baronet, Scottish builder
- John McTaggart , American jockey
- Sir John Mactaggart, 2nd Baronet, Scottish businessman, son of the 1st Baronet; see Mactaggart baronets
- Sir John Mactaggart, 4th Baronet, Scottish businessman and philanthropist, grandson of the above
- John Auld Mactaggart, heir of the above