[3] Southbrook Township was organized in 1871, and named for the numerous small springs which flow to the Des Moines River.

12.5% of all households were made up of individuals, and 5.0% had someone living alone who was 65 years of age or older.

There were 10.0% of families and 6.0% of the population living below the poverty line, including no under eighteens and none of those over 64.

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

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