
Massachusetts is divided into 14 counties, from the island county of Nantucket to the rural expanses of Worcester and Berkshire counties. Use the interactive maps below to explore counties and their boundaries. Download free maps or learn more about creating a custom map of Massachusetts to visualize your own data.
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This map supports surrounding areas, roads, rivers and cities. New
This map is divided into 14 counties.
Sep 15, 2025:
Aug 26, 2024:
The Commonwealth of Massachusetts has 14 counties: Barnstable, Berkshire, Bristol, Dukes, Essex, Franklin, Hampden, Hampshire, Middlesex, Nantucket, Norfolk, Plymouth, Suffolk, and Worcester.
Boston is in Suffolk County, which also includes Chelsea, Revere, and Winthrop.
Worcester County is the largest Massachusetts county by land area, covering about 1,513 square miles (3,919 km²).
Middlesex County is the most populous county, with about 1.61 million residents.
You can use Ultimaps to create custom maps of Massachusetts. Color-code counties manually or upload data, place pins, customize the look and feel, and export to PNG, PDF, or SVG.