St. Mary’s Catholic School operates two campuses in Alton.

The Pre-Kindergarten through Grade Five facilities are located on the original parish grounds, conveniently located just a few blocks from Marquette Catholic High School near the Mississippi riverfront in downtown Alton.

Since 2006, the Middle School facility serves Grade Six through Grade Eight on the site of the former St. Matthew’s School in the eastern corridor of Alton.

Elementary School

536 East Third Street, Alton, IL 62002
(618) 465-8523

Middle School

1015 Milton Road, Alton, IL 62002
(618) 465-9719