16% of all households were made up of individuals, and 6.7% had someone living alone who was 65 years of age or older.

According to the American Community Survey estimate for 2013, the median income in the township for a household was $62,813, and for a family was $68,125.

About 6.8% of the population lived below the poverty line, including 7.1% of those under the age of eighteen and 15.8% of those 65 or over.

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

At the state level, Sioux Valley Township is located in Senate District 22, represented by Democrat Bill Weber, and in House District 22B, represented by Republican Rod Hamilton.