Guilford Later in the 17 th century, Guilford became part of the New Haven Colony and then the Connecticut Colony. Guilford's William Leete was one of the first governors of these colonies. By the 18th century, the town had become a thriving coastal community with agriculture and the sea supporting the economy.
The town includes the resort villages of North Guilford, Sachem Head, and Leetes Island. It has some of the best-preserved colonial houses in Connecticut, including Hyland House (1660), the Henry Whitfield House (1639 the oldest stone house in New England, now a state museum), and the Thomas Griswold House Museum.