Londonderry is a town in western Rockingham County, New Hampshire, United States. The town sits between Manchester and Derry, the largest and fourth-largest communities in the state. The population was 24,129 at the 2010 census and an estimated 26,126 in 2017. Londonderry is known for its apple orchards and is home to the headquarters of Stonyfield Farm and part of Manchester-Boston Regional Airport.
The more densely settled portion of town, where 11,037 people lived at the 2010 census, is defined as the Londonderry census-designated place (CDP) and roughly occupies the southeastern and southern parts of town, around New Hampshire Route 102.
Londonderry lies in an area that was first known as Nutfield because of the dense woods with nut trees. A petition for the town was submitted to the General Court of the Province of New Hampshire on September 23, 1719. That petition stated that the petitioners had settled “at Nutfield about the Eleventh of Aprile last” – i.e. April 11, 1719. That petition requested “ten miles square” and stated that there were now about seventy families and inhabitants from both Ireland and New England.