Massachusetts House of Representatives' Barnstable, Dukes and Nantucket district in the United States is one of 160 legislative districts included in the lower house of the Massachusetts General Court. It covers Dukes County, Nantucket County, and part of Barnstable County. Since 2025, Thomas Moakley of the Democratic Party has represented the district.
The district includes the following localities:
The current district geographic boundary overlaps with those of the Massachusetts Senate's Cape and Islands and Plymouth and Barnstable districts.