The Illinois Monument is a public monument located in the Kennesaw Mountain National Battlefield Park in Cobb County, Georgia, United States. The monument honors the soldiers from Illinois who fought in the Battle of Kennesaw Mountain during the Atlanta campaign of the American Civil War. It is located on Cheatham Hill, the site of intense fighting during the battle, and was dedicated in 1914, on the 50th anniversary of the battle. It was designed by Mario Korbel and James Dibelka.