Avon is a village in Fulton County, Illinois, United States.

On April 4, 1852, the United States Postmaster General gave the town the name of "Avon" to avoid confusion with another community in McHenry County, IL.

43.90% of all households were made up of individuals, and 18.29% had someone living alone who was 65 years of age or older.

[6] A small portion of the village extends west into Warren County.

According to the 2021 census gazetteer files, Avon has a total area of 0.44 square miles (1.14 km2), all land.