Stonyfield Farm, also simply called Stonyfield, is an organic yogurt maker and dairy company located in Londonderry, New Hampshire, United States. Stonyfield Farm was founded by Samuel Kaymen in 1983, on a 19th-century farmstead in Wilton, New Hampshire, as an organic farming school. The company makes the second leading brand of organic yogurt in North America, with 13.3% of the market.

Londonderry is a town in western Rockingham County, New Hampshire, United States. It sits between Manchester and Derry, the largest and fourth-largest communities in the state. The population was 25,826 at the 2020 census. Londonderry is known for its apple orchards and is home to the headquarters of Stonyfield Farm and part of Manchester–Boston Regional Airport.