Barnstable County (1685 - Present)
Berkshire County (1761 - Present)
Bristol County (1685 - Present)
Devonshire County (1673 - 1675)
Dukes County (1695 - Present)
Essex County (1643 - Present)
Franklin County (1811 - Present)
Hampden County (1812 - Present)
Hampshire County (1662 - Present)
Middlesex County (1643 - Present)
Nantucket County (1695 - Present)
New Plymouth Colony County (1630 - Present)
Norfolk County (1793 - Present)
Norfolk County Original (1643 - 1679)
Pawtuxet Settlement (1642 - 1658)
Plymouth County (1685 - Present)
Suffolk County (1643 - Present)
Worcester County (1731 - Present)