Wyanett Township derives its name from a place in Illinois.

As of the census[1] of 2000, there were 1,698 people, 620 households, and 497 families residing in the township.

There were 767 housing units at an average density of 23.1/sq mi (8.9/km2).

There were 620 households, out of which 32.4% had children under the age of 18 living with them, 71.6% were married couples living together, 4.4% had a female householder with no husband present, and 19.7% were non-families.

15.6% of all households were made up of individuals, and 5.5% had someone living alone who was 65 years of age or older.