[2] According to the 2021 census gazetteer files, Crooked Creek Township has a total area of 34.16 square miles (88.47 km2), all land.

As of the 2020 census[2] there were 325 people, 123 households, and 110 families residing in the township.

There were 180 housing units at an average density of 5.27 per square mile (2.03/km2).

The racial makeup of the township was 92.92% White, 0.62% African American, 0.00% Native American, 0.31% Asian, 0.31% Pacific Islander, 0.00% from other races, and 5.85% from two or more races.

10.60% of all households were made up of individuals, and 10.60% had someone living alone who was 65 years of age or older.