As of the census[1] of 2000, there were 281 people, 110 households, and 91 families residing in the township.

There were 119 housing units at an average density of 3.4 per square mile (1.3/km2).

14.5% of all households were made up of individuals, and 7.3% had someone living alone who was 65 years of age or older.

About 10.3% of families and 15.2% of the population were below the poverty line, including 28.8% of those under the age of eighteen and 3.7% of those 65 or over.

At the state level, Delafield Township is located in Senate District 22, represented by Republican Bill Weber (politician), and in House District 22B, represented by Republican Rod Hamilton.