Massachusetts Senate's 4th Middlesex district

Massachusetts Senate's 4th 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 Cindy Friedman of Arlington has represented the district since 2017.

[3] The district includes the following localities:[2] The district previously covered the following: [4]

Map of Massachusetts Senate's 4th Middlesex district, based on the 2010 United States census .
Map of the 1876 apportionment of the 4th Middlesex senatorial district