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Why Althoff Catholic

Why Althoff Catholic

Admission Application for the 2026-27 School Year is now OPEN!

WHERE PREPARATION MEETS POTENTIAL

"Rooted in Jesus Christ and Catholic values, we aspire to achieve our personal

best in all we do."

Preparing Students for Success for Over 50 Years

At Althoff Catholic College Preparatory High School, we help every student discover their potential and maximize their abilities. Rooted in the traditions of our Catholic faith and guided by a modern approach to education, we prepare students for success in college, the military, and future careers.

Our results speak for themselves: each graduating class earns an average of $10 million in scholarships each year.

A Well-Rounded Education

We believe success comes from growth in every area of life—academic, athletic, artistic, and altruistic. That’s why we partner with students and families to help them grow into confident young adults who know who they are.

To prepare students for life after graduation, we offer:

  • Hands-on learning in engineering, biomedical science, forensics, and art
  • Dual credit and Advancement College Placement courses - 1818 Advanced College Credit through SLU as well as SWIC and AP courses starting in the junior year– earn real college credit while still in high school
Find Your Fit at Althoff Catholic

We welcome all students seeking a personalized, faith-based education that challenges and supports them. We’d love to connect with you and your family to talk about your goals and show you how Althoff Catholic can be the right fit for your future.

"Crusaders are modern day change agents who are not only learning,

but teaching the world how to live, work, play, and pray!"

We are a faith-based community where belief in God is part of the everyday environment.

More than a school—we’re a family. Here, students are supported, inspired, and empowered to thrive.

We believe in educating the whole person - academically, spiritually, and emotionally.

Real-world learning and hands-on experiences prepare our students for success in the future.

  • Why Althoff
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    • Affordable Tuition
  • Inquire
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  • Apply Today
    Both 2025-26 and 2026-27 applications are open! We accept transfer students throughout the school year. Apply Today!
  • Crusader for a Day Shadow Visit

    Come spend a day as a Crusader! Sign up today

  • Financial Aid

    Apply for 2026 now!

  • Crusader Summer Camps

    Check out the Crusader Summer Camps available this summer! New camps added weekly. We hope you can join us!!!

  • Get Involved
    See how you can become part of our volunteer community and get involved with different groups and projects!

Upcoming Events

February 13 - Friday
Incoming Student Scholarship Deadline

Sophomore Retreat
February 16 - Monday
No School - Presidents Day
February 18 - Wednesday
Ash Wednesday
February 19 - Thursday
Parents & Friends Club Meeting
February 23 - Monday
School Board Meeting
February 25 - Wednesday
New Student Meeting
February 26 - Thursday
Junior Retreat @ Camp Ondesonk(Group 2)
February 27 - Friday
Junior Retreat @ Camp Ondesonk(Group 2)
March 3 - Tuesday
Model UN
March 4 - Wednesday
Model UN
March 5 - Thursday
Model UN
March 6 - Friday
No School
March 7 - Saturday
Althoff Catholic Gala
March 9 - Monday
No School
March 18 - Wednesday
Grandparents Day Mass for 9th & 10th Graders
March 19 - Thursday
Parents & Friends Club Meeting

Junior Retreat @ Camp Ondesonk (Group 3)
March 20 - Friday
Junior Retreat @ Camp Ondesonk (Group 3)
March 23 - Monday
School Board Meeting
March 25 - Wednesday
Grandparents Day Mass for 11th & 12th Graders
April 2 - Thursday
No School - Easter Break
April 3 - Friday
No School - Easter Break
April 4 - Saturday
No School - Easter Break
April 5 - Sunday
No School - Easter Break
April 6 - Monday
No School - Easter Break
April 9 - Thursday
Spring Musical - Grade School Matinees
April 10 - Friday
Spring Musical-The Drowsy Chaperone
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Contact Us

5401 W Main St.
Belleville, IL 62226
Main Office: 618.235.1100
Fax: 618.235.9535
info@althoffcatholic.org

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FACTS Website Services

Althoff Catholic High School admits students of any race, color, national, or ethnic origin to all the rights, privileges, programs, and activities generally accorded or made available to students at the school. It does not discriminate on the basis of race, color, national, or ethnic origin in administration of its educational policies, admissions policies, scholarship and loan programs, and athletic and other school-administered programs.

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