Stephen Francis Lynch is an American businessman, attorney and politician who has served as a member of the U.S. House of Representatives from Massachusetts since 2001. A Democrat, he represents Massachusetts's 8th congressional district, which includes the southern fourth of Boston and many of its southern suburbs. Lynch was previously an ironworker and lawyer, and served in both chambers of the Massachusetts General Court.

Massachusetts's 8th congressional district is located in eastern Massachusetts, including part of Boston. It is represented by Democrat Stephen Lynch. For one congressional term (1791–1793), it served as the home district of the District of Maine. The district boundaries were significantly changed, as of the elections of 2012, due to redistricting after the 2010 census, with the old 8th district largely being shifted to the new 7th district. The new 8th district comprises many of the communities of the old 9th district, as well as some easternmost Norfolk County communities and northernmost Plymouth County communities of the old 10th district.