John Bassett Alley was a businessman and politician who served as a U.S. Representative from Massachusetts.

Massachusetts's 6th congressional district is located in northeastern Massachusetts. It contains most of Essex County, including the North Shore and Cape Ann, as well as part of Middlesex County. It is represented by Seth Moulton, who has represented the district since January 2015. The shape of the district went through minor changes effective from the elections of 2012 after Massachusetts congressional redistricting to reflect the 2010 census. The towns of Tewksbury and Billerica were added, along with a small portion of the town of Andover.