John Tremayne (1825–1901) was a member of a landed family in the English county of Cornwall, and owner of the Heligan estate near Mevagissey. At various times, he was a member of the UK Parliament for the constituencies of East Cornwall and South Devon, and High Sheriff of Cornwall. He was also the third of four successive members of the Tremayne family who are credited with the creation of the gardens around Heligan House that are now well known as the Lost Gardens of Heligan.
- Occupation
- horticulturist, politician
- Position held
- member of the 22nd Parliament of the United Kingdom, member of the 21st Parliament of the United Kingdom, High Sheriff of Cornwall
- Citizenship
- United Kingdom of Great Britain and Ireland
