Greenfield is a city in Weakley County, Tennessee, United States.

As of the 2020 United States census, there were 2,031 people, 1,017 households, and 600 families residing in the city.

As of the census[4] of 2000, there were 2,208 people, 925 households, and 624 families residing in the city.

There were 1,007 housing units at an average density of 278.9 per square mile (107.7/km2).

30.1% of all households were made up of individuals, and 16.3% had someone living alone who was 65 years of age or older.