Massachusetts's 4th congressional district is located mostly in southern Massachusetts. It is represented by Democrat Jake Auchincloss. Auchincloss was first elected in 2020. The district covers much of the area included in the before the 1992 redistricting. In prior years, the district stretched from Brookline to Fitchburg. The shape of the district underwent some changes effective from the elections of 2012, after Massachusetts congressional redistricting to reflect the 2010 census. Most of Plymouth County and the South Coast are included in the new 9th district. The new 4th district has expanded westward to include towns along the Rhode Island border that had been in the old 3rd district. For a very brief time (1793–95) it represented part of the District of Maine. Recent election results from statewide races List of members representing the district Recent election results 2002 2004 2006 2008 2010 2012 2014 2016 2018 2020 2022 Notes References Congressional Biographical Directory of the United States 1774–present External links Maps Map of Massachusetts's 4th Congressional District, via Massachusetts Secretary of the Commonwealth Election results CNN.com 2004 election results CNN.com 2006 election results US House of Representatives Clerk's Office, 2006 election results US House of Representatives Clerk's Office, 2008 election results Massachusetts U.S. Congress 2010 Election Results Government of Bristol County, Massachusetts 04 Government of Middlesex County, Massachusetts Government of Norfolk County, Massachusetts Government of Plymouth County, Massachusetts 1789 establishments in Massachusetts Constituencies established in 1789