Newfield is a town in Tompkins County, New York, United States. The population was 5,108 at the 2000 census. The town's name is derived from the many unoccupied tracts of land that were once in the town. During the Depression many abandoned farms were turned into conservation lands. Newfield contains one of New York State's few remaining covered bridges. The Town of Newfield is in the southwest part of the county and is southwest of Ithaca, New York.