[1] According to the 2021 census gazetteer files, Raritan Township has a total area of 34.01 square miles (88.09 km2), all land.

[2] The township contains two cemeteries: Raritan and Saint Patrick's.

As of the 2020 census[1] there were 242 people, 58 households, and 48 families residing in the township.

There were 120 housing units at an average density of 3.53 per square mile (1.36/km2).

15.50% of all households were made up of individuals, and 13.80% had someone living alone who was 65 years of age or older.