Ledyard/ldrd/ is a town in New London County, Connecticut, United States, located along the Thames River. The town is named after Colonel William Ledyard, a Revolutionary War soldier who was killed with his own saber after surrendering to the British at the end of the Battle of Groton Heights. The population was 15,051 at the 2010 census. The Foxwoods Resort Casino, owned and operated by the Mashantucket Pequot Tribe, was located in the northeastern section of Ledyard, until the land was annexed by the tribe. Ledyard's zip code is 06339. Within the southwestern area of Ledyard is the district known as Gales Ferry, which has the postal code 06335. According to the United States Census Bureau, the town has a total area of 40.0 square miles (104km2), of which 38.1 square miles (99km2) is land and 1.9 square miles (4.9km2), or 4.62%, is water. Ledyard is situated north of Groton, and borders the east bank of the Thames River in southeastern Connecticut. The northern half of the Naval Submarine Base New London is located in the southwest corner of the town.