Ledyard 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 at 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, is located in the northeastern section of Ledyard, on land owned 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.