Litchfield is a town in and former county seat of Litchfield County, Connecticut, United States, and is known as an affluent summer resort. The population was 8,316 at the 2000 census. The boroughs of Bantam and Litchfield are located within the town. There are also two unincorporated villages: Northfield and Milton.
Founded in 1719, Litchfield was designated the county seat in 1751, and by the 1790s the town had become the leading commercial, social, cultural and legal center of Northwestern Connecticut. Its population grew from 1,366 in 1756 to 2,544 in 1774, and by 1810 Litchfield was the fourth largest settlement in the state with a population of 4,639.
In October 1777, William Franklin, the son of Benjamin Franklin, may have been jailed in the Litchfield jail because he was a Loyalist.