As of the census[1] of 2000, there were 3,559 people, 1,266 households, and 965 families residing in the township.

There were 1,332 housing units at an average density of 37.1 per square mile (14.3/km2).

There were 1,266 households, out of which 37.2% had children under the age of 18 living with them, 61.7% were married couples living together, 9.6% had a female householder with no husband present, and 23.7% were non-families.

18.7% of all households were made up of individuals, and 7.2% had someone living alone who was 65 years of age or older.

A post office called Northgrove opened at North Grove and Mertz Roads (now M-24) and operated from February 21, 1899 to March 15, 1901.