European-American settlement of Georgetown Township was begun in 1834 by the brothers Hiram and Samuel Jenison.

[4] At the 2020 census there were 54,091 people, 19,164 households, and 14,290 families living in the township.

There were 19,878 housing units at an average density of 559.5 per square mile (216.0/km2).

The racial makeup of the township was 90.45% White, 1.32% Black or African American, 0.24% American Indian and Alaska Native, 1.48% Asian, 0.02% Native Hawaiian and Other Pacific Islander, 1.32% from some other race, and 5.19% from two or more races.

[5] Of the 14,099 households 41.0% had children under the age of 18 living with them, 71.9% were married couples living together, 5.1% had a female householder with no husband present, and 21.0% were non-families.