Fairfield County (1666 - Present)
Hartford County (1666 - Present)
Litchfield County (1751 - Present)
Middlesex County (1785 - Present)
New Haven County (1666 - Present)
New London County (1666 - Present)
Tolland County (1785 - Present)
Westmoreland Ext County (1776 - 1782)
Windham County (1726 - Present)