Northfield Township contains these seven cemeteries: North Northfield (owned and operated by the Village of Northbrook), Northfield Union, Oak Wood, Sacred Heart, Saint Johns, Saint Marys, and Sunset Memorial Lawns.

As of the 2020 census[1] there were 91,565 people, 33,505 households, and 23,816 families residing in the township.

There were 37,020 housing units at an average density of 1,068.89 per square mile (412.70/km2).

The racial makeup of the township was 72.16% White, 1.28% African American, 0.26% Native American, 18.04% Asian, 0.02% Pacific Islander, 2.57% from other races, and 5.68% from two or more races.

26.90% of all households were made up of individuals, and 16.90% had someone living alone who was 65 years of age or older.