[3] The township was first settled in 1856 and organized during the American Civil War in 1862, and was named in honor of German immigrant and Union Army general Franz Sigel.

[5] As of the census[1] of 2000, there were 432 people, 151 households, and 122 families residing in the township.

The racial makeup of the township was 98.84% White, 0.23% Asian, and 0.93% from two or more races.

There were 151 households, out of which 36.4% had children under the age of 18 living with them, 75.5% were married couples living together, 1.3% had a female householder with no husband present, and 19.2% were non-families.

14.6% of all households were made up of individuals, and 4.0% had someone living alone who was 65 years of age or older.