The Town of Harwinton, located in Litchfield County, was incorporated in 1737 from land controlled by the towns of Hartford and Windsor. The name is a combination of those towns, HARtford and WINdsor TOwN. Harwinton, Connecticut is the only town with that name.

Located in Litchfield County, Harwinton has an area of 31.1 square miles and a population of approximately 5,300. There are 2 voting districts. Principal industries are agriculture, retail services, landscaping, construction and tool and die manufacturing.