The Althoff Catholic Crusaders play Illinois high school football (IHSA) as a 2010 member of the South Seven conference. Althoff Catholic High School is located in Belleville, Illinois. Belleville is in St. Clair county. The Crusaders' Illinois Pigskin region is the 618 Football Region. They are coached by Ken Turner entering his 3rd year of coaching at Althoff Catholic. The school Athletic Director is Al Foppe.

The schools 2010 enrollment numbers are 780.45. The Crusaders' colors are Navy Blue/Gold. Althoff Catholic has qualified for the IHSA playoffs 17 times, the last playoff appearance was 2009. They have qualified for the playoffs 1 consecutive years.