The racial makeup of the township was 98.56% White, 0.96% Native American, 0.48% from other races.

12.5% of all households were made up of individuals, and 4.2% had someone living alone who was 65 years of age or older.

About 3.2% of families and 1.9% of the population were below the poverty line, including none of those under the age of eighteen or sixty five or over.

Fenton Township is located in Minnesota's 1st congressional district, represented by Mankato educator Tim Walz, a Democrat.

At the state level, Fenton Township is located in Senate District 22, represented by Republican Doug Magnus, and in House District 22A, represented by Republican Joe Schomacker.