John Yarde-Buller, 1st Baron Churston (12 April 1799 – 4 September 1871) was a British, Conservative politician.
Born John Buller-Yarde-Buller, he was the eldest son of Sir Francis Buller-Yarde-Buller, Bt. and his wife, Elizabeth. In 1833, he inherited his father's baronetcy and entered Parliament two years later as MP for South Devon. He held the seat for almost twenty-four years and on his retirement in 1858, was raised to the peerage as Baron Churston, of Churston Ferrers and Lupton, Co. Devon. In 1860, he changed the family name to Yarde-Buller.
On 24 January 1823, Yarde-Buller married Elizabeth Wilson-Patten (the sister of the future Lord Winmarleigh); the couple had two children:
Lord Churston died in 1871 and his titles passed to his eldest grandson, John.