Massachusetts House of Representatives' 18th 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 Lowell in Middlesex County.
[1][2] Democrat Tara Hong of Lowell has represented the district since 2025.
[3] The current district geographic boundary overlaps with that of the Massachusetts Senate's 1st Middlesex district.
[4] The district previously covered: