Deerfield is a city in Kearny County, Kansas, United States.

[4] According to the United States Census Bureau, the city has a total area of 0.47 square miles (1.22 km2), all of it land.

[6] The 2020 United States census counted 711 people, 235 households, and 169 families in Deerfield.

There were 259 housing units at an average density of 538.5 per square mile (207.9/km2).

24.3% of households consisted of individuals and 9.8% had someone living alone who was 65 years of age or older.

There were 249 housing units at an average density of 529.8 per square mile (204.6/km2).

19.1% of all households were made up of individuals, and 6.8% had someone living alone who was 65 years of age or older.

There were 284 housing units at an average density of 592.2 per square mile (228.6/km2).

16.3% of all households were made up of individuals, and 5.6% had someone living alone who was 65 years of age or older.

The community is served by Deerfield USD 216 public school district.