The township derives its name from the poem Sweet Afton by Robert Burns.

[4] As of the 2020 census[2] there were 901 people, 234 households, and 194 families residing in the township.

There were 384 housing units at an average density of 10.92 per square mile (4.22/km2).

The racial makeup of the township was 84.91% White, 5.44% African American, 0.22% Native American, 0.89% Asian, 0.00% Pacific Islander, 2.00% from other races, and 6.55% from two or more races.

7.70% of all households were made up of individuals, and 0.00% had someone living alone who was 65 years of age or older.