Katherine Clark (Democrat) has served Massachusetts’s 5th Congressional District since a 2013 special election. The district covers Billerica and surrounding Middlesex/Essex communities (Malden, Medford, Melrose, Reading, Stoneham, Wakefield, Winchester, Woburn, plus parts of Somerville and Cambridge).
Clark is House Minority Leader (since Jan 2023), the second-highest Democratic position in the chamber. She previously served as Assistant Speaker and Vice Chair of the Democratic Caucus.