Ledyard (/ˈlɛdʒɜːrd/ LEH-jerd) 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 officer who was killed at the Battle of Groton Heights.

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 southwestern corner of the town.

The town has set aside land designated as a "Glacial Park", which consists of a section of end moraine and outwash deposits (containing kettles).

This area encompasses a segment of the "Ledyard Moraine"—a clast-supported boulder deposit that is anomalous in nature.

Other minor communities and geographic areas are Aljen Heights, Barrett Park, Colonial Manor, Cranwood Homestead, Highlands, Lakeside, Lantern Hill, Long Pond, Parsonage Hill Manor, Presidential Estates, Quaker Town, and Stonehenge.

The town previously had provided police services through the Resident State Trooper Program.

The department employs 22 highly trained personnel, including the chief, captain, lieutenant, an administrative assistant, and one detective.

Other major employers include Foxwoods Resort Casino, Electric Boat, and Pfizer.

Ledyard was featured on an episode of the MTV show MADE, in which Katherine, a shy, book-loving teenager, is made into Miss Congeniality in her town's beauty pageant for Miss Ledyard Fair.