Holy Trinity Catholic Church serves the Catholic community in Fairview Heights, Illinois. Our parish is a proud member of the Belleville Diocese and the East St. Louis Deanery. Our parish complex covers 84,439 square feet and contains the church sanctuary, multiple meeting and gathering spaces, and a Kindergarten through 8th Grade Catholic school. The building is surrounded by sports and agriculture fields. As of 2010, there are more than 1,100 families registered with Holy Trinity Church and about 200 students in Holy Trinity School. We invite you to call us for a tour.