Westline Township was organized in 1878, and named for its location near the western county line.

As of the census[1] of 2000, there were 203 people, 72 households, and 65 families residing in the township.

There were 72 households, out of which 38.9% had children under the age of 18 living with them, 81.9% were married couples living together, 4.2% had a female householder with no husband present, and 9.7% were non-families.

9.7% of all households were made up of individuals, and 4.2% had someone living alone who was 65 years of age or older.

About 9.5% of families and 11.2% of the population were below the poverty line, including 8.8% of those under the age of eighteen and none of those 65 or over.