Greenfield is a town in Blaine County, Oklahoma, United States.

[4] The 80 original acres of Greenfield began as the homestead in 1899 of one George Evans.

[5] Somewhere in the 1900-1902 timeframe, the Choctaw Northern Railroad built through the area, its line running from Geary, Oklahoma to its termination at Anthony, Kansas.

[5] By 1913, the town had about 300 inhabitants, a newspaper (The Greenfield Hustler), a bank, a lumberyard, two livery barns, two grain elevators, a grist mill, a hotel, an opera house, and various merchants and contractors.

According to the United States Census Bureau, the town has a total area of 0.1 square miles (0.26 km2), all land.