St. Catherine of Alexandria is a parish in Oak Lawn where people come to practice their faith and to support one another. Parish members volunteer at the local homeless shelter, collect food for the community's pantries and support local and international missions.  

St. Catherine's offers a men's club, Eucharistic ministry, music ministry, a Hoping Society that anonymously helps people in need, a support group for widows and widowers, a seniors group and a teen group that travels to impoverished communities in the United States to perform mission work.

Daily mass is offered six days a week, as well weekend masses. The parish provides religious education for children of Catholic faith who attend public schools in grades 1-8.