Mount Carmel High School (MCHS) is the only high school in Wabash County, Illinois, which is in southern Illinois, just across the Wabash River from Gibson County, Indiana. Other towns that send students to MCHS include Allendale, Patton, Keensburg, and Friendsville. Enrollment is also possible for residents of Cowling, although their students are usually sent to the nearby school in Grayville. In 2005, 633 students enrolled in MCHS.