Greenfield is a community in the Canadian province of Nova Scotia, located in the Region of Queens Municipality. The sawmill in Greenfield, founded in 1832, is one of the oldest family-run sawmill businesses in North America. Until 1850 the region was occupied mostly by the Mi'kmaq of the Algonquin tribe, who seasonally settled the area below the lakes on either side of what is now called the Medway River and was known by the Mi'kmaq as Wigadoon.