Dieter Township contains the unincorporated communities of Pinecreek and Ross.

[3] According to the United States Census Bureau, the township has a total area of 44.4 square miles (115 km2), all land.

There were 77 housing units at an average density of 1.7 per square mile (0.66/km2).

15.4% of all households were made up of individuals, and 6.2% had someone living alone who was 65 years of age or older.

None of the families and 5.9% of the population were living below the poverty line, including no under eighteens and 10.7% of those over 64.