Fairfield is a town in Herkimer County, New York, United States.

A few settlers, actually tenants, made the future town their home before the American Revolution, but the major influx took place after 1785, mainly from New England.

[3] The western town line is marked by West Canada Creek.

New York State Route 169 is a north–south highway in the western part of the town.

New York State Route 170 is another north–south highway, but in the eastern part of Fairfield.

19.1% of all households were made up of individuals, and 7.7% had someone living alone who was 65 years of age or older.