Massachusetts Senate's 1st Middlesex district in the United States is one of 40 legislative districts of the Massachusetts Senate.
[1] It covers portions of Middlesex county.
[2] Democrat Ed Kennedy of Lowell has represented the district since 2019.
[3] The district includes the following localities:[2] The current district geographic boundary overlaps with those of the Massachusetts House of Representatives' 1st Middlesex, 2nd Middlesex, 16th Middlesex, 17th Middlesex, 18th Middlesex, and 36th Middlesex districts.
[4] The district previously covered Charlestown, circa 1860s.