Calhoun High School is a public high school in Hardin, Illinois, that is part of the Calhoun Community Unit School District 40.

Calhoun serves the communities of Hardin, Batchtown, Hamburg, Kampsville, Michael, and Mozier.

[2][3] The school has five state championships on record in team athletics and activities: football in 1992–1993 (1A) and 1993–1994 (1A), girls basketball in 2015–2016 (1A), and girls softball in 2015 (1A) and 2016 (1A.)

Due to its small enrollment, Calhoun cooperates with nearby Brussels High School or Pleasant Hill High School for some athletics (Brussels for football, volleyball, basketball, softball and baseball.

Pleasant Hill for track and field).