John Brett
John Brett may refer to:
- John Brett , British artist associated with the Pre-Raphaelite movement
- John Brett , English author of Brett's Narrative, about the Marian exiles
- John Brett , bishop of Elphin
- John Brett , Royal Navy admiral
- John Brett, English international rugby union player
- John Aloysius Brett, administrator in British India
- John Michael Brett, nom de plume of English author Miles Tripp
- John Watkins Brett, English telegraphic engineer
- John Henry Brett, Irish architect, builder, and county surveyor