Althoff Catholic High School is a Private School serving the St. Clair County community. Located in Belleville, IL, the Co-educational private school teaches Grade 9 to Grade 12, with a Roman Catholic religious orientation.
As of the last reported school year in 2019-2020, 312 students attended Althoff Catholic High School with a student to teacher ratio of 13.11, earning a ratio grade of D. Althoff Catholic High School ranks #151 in size compared to all Illinois private schools.
If a diverse private school is essential, Althoff Catholic High School ranks #248 in Illinois for diversity, earning a grade of C.