Thomastown Township was named for Thomas Scott, an early settler.

[4] As of the census[1] of 2000, there were 714 people, 251 households, and 211 families residing in the township.

The population density was 17.4 people per square mile (6.7/km2).

There were 251 households, out of which 34.3% had children under the age of 18 living with them, 78.5% were married couples living together, 0.8% had a female householder with no husband present, and 15.9% were non-families.

13.1% of all households were made up of individuals, and 6.4% had someone living alone who was 65 years of age or older.