Seymour is a census-designated place in Champaign County, Illinois, United States.

It is part of Mahomet-Seymour Community Unit School District No.

[3] It is located in Scott Township, Champaign County, Illinois.

According to the 2021 census gazetteer files, Seymour has a total area of 0.09 square miles (0.23 km2), all land.

26.83% of all households were made up of individuals, and none had someone living alone who was 65 years of age or older.