The city of Cook is located within Owens Township geographically but is a separate entity.

[5] According to the United States Census Bureau, the township has a total area of 29.5 square miles (76 km2); 0.03% is water.

At the 2000 census there were 270 people, 111 households, and 81 families living in the township.

The racial makeup of the township was 96.30% White, 2.96% Native American and 0.74% from two or more races.

About 13.5% of families and 13.1% of the population were below the poverty line, including 26.5% of those under the age of eighteen and none of those sixty five or over.