According to the 2021 census gazetteer files, Pella Township has a total area of 36.15 square miles (93.63 km2), all land.

[2] As of the 2020 census[1] there were 160 people, 92 households, and 69 families residing in the township.

There were 81 housing units at an average density of 2.24 per square mile (0.86/km2).

The racial makeup of the township was 89.38% White, 0.00% African American, 1.25% Native American, 1.25% Asian, 0.00% Pacific Islander, 1.88% from other races, and 6.25% from two or more races.

13.00% of all households were made up of individuals, and 6.50% had someone living alone who was 65 years of age or older.