Supposedly, the name was taken from an early settler's love of the song "Flow Gently, Sweet Afton."
The town was organized in 1854.
They sent some 81 men into Union service during the Civil War, out of a population of 516. Six of them did not come home.
I will write about the town's Civil War experience in my Saw the Elephant Civil War Blog.
The town is also called Afton Center and is south of DeKalb on Illinois Highway 23.