Massachusetts House of Representatives' 12th Middlesex district

Massachusetts House of Representatives' 12th 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 the city of Newton in Middlesex County.

[1][2] Democrat Ruth Balser of Newton has represented the district since 2003.

[3] The current district geographic boundary overlaps with that of the Massachusetts Senate's 1st Middlesex and Norfolk district.

[4] The district previously covered Waltham, circa 1872.