Hendrum Township was organized in 1880, and named after a place in Norway.

As of the census[1] of 2000, there were 118 people, 46 households, and 36 families residing in the township.

There were 54 housing units at an average density of 1.3 per square mile (0.50/km2).

The racial makeup of the township was 96.61% White, 2.54% Native American and 0.85% Asian.

15.2% of all households were made up of individuals, and 10.9% had someone living alone who was 65 years of age or older.