Litchfield is a town in Kennebec County, Maine, United States. The population was 3,624 at the 2010 census. Litchfield is included in the Augusta, Maine micropolitan New England City and Town Area.
Litchfield was incorporated in 1795 and was originally known as Smithtown Plantation. It is found in the 1790 census as Smithtown Plantation, Lincoln County, Maine.