[3] Westbrook Township was organized September 17, 1870 and named for the western branch of Highwater Creek.

13.7% of all households were made up of individuals, and 7.8% had someone living alone who was 65 years of age or older.

About 2.4% of families and 3.2% of the population were below the poverty line, including none of those under the age of eighteen and 8.3% of those 65 or over.

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

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