Greenfield is the county seat and the only city located within Franklin County in the state of Massachusetts, United States. First settled in 1686, the city had a recorded population of 17,768 as of the 2020 census.
The city features a Main Street Historic District characterized by notable examples of Federal, Greek Revival, and Victorian architecture. Local cultural and educational institutions include Greenfield Community College, the Pioneer Valley Symphony Orchestra, the Green River Festival, and the Franklin County Fair.