Greenfield is a city in and the county seat of Franklin County, Massachusetts, United States. Greenfield was first settled in 1686. The population was 17,768 at the 2020 census. Greenfield is home to Greenfield Community College, the Pioneer Valley Symphony Orchestra, and the Franklin County Fair. The city has a Main Street Historic District containing fine examples of Federal, Greek Revival, and Victorian architecture. Greenfield is part of the Springfield, Massachusetts, Metropolitan Statistical Area.
Greenfield was one of several Massachusetts municipalities that applied for, and were granted, city forms of government but wished to retain "The Town of" in their official names. In December 2017, the Town Council voted to remove "The Town of" designation, making Greenfield known as the City of Greenfield. Since the charter change in 2003 Greenfield has been governed by a town council and a mayor. The former town council is now called the city council and consists of four at-large councilors and nine councilors that are each elected from one of the city's nine electoral precincts.