John Buller (1721–1786) was a British politician who sat in the House of Commons for 39 years from 1747 to 1786.
[2] In 1754 Buller was re-elected MP for East Looe and in the same year was appointed Comptroller of the Mint.
In July 1765 he was Lord of the Admiralty, a post he held until September 1780.
He was again mayor of East Looe in 1772 and in the same year became auditor of the Duchy of Cornwall.
He was Lord of the Treasury from September 1780 to March 1782 and again in December 1783.