The racial makeup of the township was 96.58% White, 0.68% African American, 0.68% Asian, and 2.05% from two or more races.

16.4% of all households were made up of individuals, and 7.3% had someone living alone who was 65 years of age or older.

There were 15.2% of families and 12.8% of the population living below the poverty line, including 23.1% of under eighteens and 8.3% of those over 64.

Delton Township is located in Minnesota's 1st congressional district, represented by Jim Hagedorn, a Republican.

At the state level, Delton Township is located in Senate District 22, represented by Republican Doug Magnus, and in House District 22B, represented by Republican Rod Hamilton.