Massachusetts Senate's 3rd Middlesex district

Massachusetts Senate's 3rd 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 Mike Barrett of Lexington has represented the district since 2013.

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

Map of Massachusetts Senate's 3rd Middlesex district, based on the 2010 United States census .