Massachusetts Senate's 1st Bristol and Plymouth district in the United States is one of 40 legislative districts of the Massachusetts Senate. It covers 26.9% of Bristol County and 3.2% of Plymouth County population. Democrat Michael Rodrigues of Westport has represented the district since 2011.
The district includes the following localities:
The current district geographic boundary overlaps with those of the Massachusetts House of Representatives' 4th Bristol, 5th Bristol, 6th Bristol, 7th Bristol, 8th Bristol, 10th Bristol, and 12th Bristol districts.