North Stonington is a town in New London County, Connecticut, United States. The population was 4,991 at the 2000 census. North Stonington was split off from Stonington in 1724. According to the United States Census Bureau, the town has a total area of 55.0 square miles (142km2), of which, 54.3 square miles (141km2) of it is land and 0.7 square miles (1.8km2) of it (1.20%) is water. Before the mid-17th century The land of North Stonington, located at the southeast corner of the State of Connecticut, was sculpted by the rise and fall of glaciers during a series of Ice Ages, the most recent of which lasted until about 10,000 years ago. As in many other areas of New England, the town has plenty of reminders of these waves of glaciation, in particular the many stones from which the town and its older sister, Stonington, derive their names.