The famous person Samuel Simpson is associated with one of more of the New Haven County historic places.
Some of the country's most noteable architects helped create the New Haven County places including Sperry & Treat, Samuel G. Russell, George H. Gray, Leoni W. Robinson, US Treasury Department, William H. Allen, Davis Hurd, Henry Austin, Berlin Iron Bridge Company and Berlin Iron Bridge Co.. Prominent architectural styles found in New Haven Country are Classical Revival, Queen Anne and Romanesque.