[3] John S. Biersdorf (1925-2009), farmer, businessman, and politician, was born in Deerfield Township.

As of the census[1] of 2000, there were 693 people, 228 households, and 189 families residing in the township.

There were 233 housing units at an average density of 6.5 per square mile (2.5/km2).

There were 228 households, out of which 43.4% had children under the age of 18 living with them, 75.9% were married couples living together, 3.1% had a female householder with no husband present, and 17.1% were non-families.

14.0% of all households were made up of individuals, and 4.8% had someone living alone who was 65 years of age or older.