The Town of Franklin is a city in Norfolk County, Massachusetts, United States. Franklin is one of thirteen Massachusetts municipalities that have applied for, and been granted, city forms of government but wish to retain "The town of" in their official names. As of 2022, the city's population was 36,745, with a growth rate of 15.38% since 2015. It is home to the country's first public library, the Franklin Public Library with its first books donated by Benjamin Franklin in 1790. It also contains the largest Catholic parish in the Boston Archdiocese, St. Mary's Catholic church, with some 15,000 members.

The MBTA Commuter Rail system serves as the commuter rail arm of the Massachusetts Bay Transportation Authority's (MBTA's) transportation coverage of Greater Boston in the United States. Trains run over 394 mi (634 km) of track to 134 stations. It is operated under contract by Keolis, which took over operations on July 1, 2014, from the Massachusetts Bay Commuter Railroad Company (MBCR).