Mahomet is Township 20 North, Range 7 East of the Third Principal Meridian.

As of the 2020 census[1] there were 13,697 people, 4,677 households, and 3,786 families residing in the township.

There were 5,391 housing units at an average density of 162.12 per square mile (62.59/km2).

The racial makeup of the township was 89.89% White, 0.88% African American, 0.23% Native American, 2.06% Asian, 0.06% Pacific Islander, 0.96% from other races, and 5.92% from two or more races.

16.90% of all households were made up of individuals, and 8.00% had someone living alone who was 65 years of age or older.