Massachusetts House of Representatives' 9th Middlesex district

Massachusetts House of Representatives' 9th Middlesex district in the United States is one of 160 legislative districts included in the lower house of the Massachusetts General Court.

It covers part of Middlesex County.

[1] Democrat Tom Stanley of Waltham has represented the district since 2001.

[2] The district includes the following localities:[3] This district previously included Lincoln prior to redistricting ahead of the 2022 election cycle.

[4] The district previously covered part of Cambridge, circa 1872.