On the national level, Leyden is represented in the United States House of Representatives as part of Massachusetts's 1st congressional district, by Richard Neal. John Olver of Amherst who represented the town in the House from June 1991 to January 2013, retired when redistricting placed him and Rep. Neal in the same district. Massachusetts is represented in the United States Senate by senior Senator Elizabeth Warren (D) and junior Senator Ed Markey (D), who won a special election in June 2013 to fill the seat vacated by Secretary of State John Kerry.