Althoff Catholic High School (Top Ranked Private School for 2026-27)

Name: Open House
Start: 2026-10-25T13:00:00-05:00
End: 2026-10-25T15:45:00-05:00
Location: Althoff Catholic High School

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Quick Facts (2026-27)

Top Ranked IL School
Grades: 9-12
Enrollment: 323 students
Yearly Tuition: $8,262
Acceptance rate: 20%
Average class size: 15 students
Application Deadline: None / Rolling
Source: ✓Verified school update

Upcoming Events

Open House - Sun., October 25, 2026 - get more information!

School Rankings

Althoff Catholic High School ranks among the top 20% of private schools in Illinois for:

School Facts

Religious Affiliation

Catholic

Grades Offered

Grades 9-12

Students By Grade

View Data

Distribution of Students By Grade
Grade	Althoff Catholic High School
9	89
10	84
11	76
12	74

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ADD/ADHD Support

Yes

Learning Difference Programs

Yes

Learning Programs Supported

Mild Learning Differences

Year Founded

1965

School Calendar

View School Calendar

Student Body

Total Students

323 students

Student Body Type

Co-ed

% Students of Color

30%

State avg.: 34%

Academic Profile

Total Classroom Teachers

28 teachers

Student-Teacher Ratio

12:1

National avg.: 11:1

Average Class Size

15 students

Matriculation DataMatric. Data

View Matriculation Data

Classroom Dress Code

Formal

Skirts and khaki pants, polos

Number of AP Courses

8 courses

List of Courses Offered

Link to List of Courses

Tuition & Financial Aid

Admission Deadline

None / Rolling

Yearly Tuition Cost

$8,262

View national tuition avg.

Tuition Notes

Different tuition rate for out of Diocese and Non-Catholic students

% on Financial Aid

27%

Average Financial Aid Grant

$1,500

Acceptance Rate

20%

National avg.: 82%

College Acceptance Rate

95%

Admissions Director

Reeta Piirala-Skoglund

Application URL

Online Application

Sports

Total Sports Offered

15 sports

Sports

Track and FieldVolleyball

Wrestling

Colors

Gold, Blue, Navy Blue

School Mascot

Crusaders

Extracurriculars

Total ExtracurricularsTotal Extra-curric.

9 extracurriculars

ExtracurricularsExtra-curric.

Club or Organization:

BASICFellowship of Christian Athletes

Spanish Club

Arts and Music Programs:

Band and ChoirTheater Program

Recreational Athletic Programs:

Chess TeamE Sports

Model UNScholar Bowl

School Notes

Althoff is a diocesan Catholic high school serving students who primarily desire to pursue, in a Catholic environment, a strong academic program that will prepare them for post-secondary education.
The school's strength and its future lie in its Catholic heritage, the diverse backgrounds of its students and faculty, and its high academic standards.
Through a process of faith formation and challenging educational experiences, faculty and staff strive to empower students not only with academic and technological skills, but also with skills for living.
Members of the Althoff Catholic High School community share a deep and abiding respect for the individual and are committed to the spiritual, moral, physical, social and intellectual development of the person.
We foster the crusader spirit that exists in each of us to serve God and neighbor.

Althoff is a diocesan Catholic high school serving students who primarily desire to pursue, in a Catholic environment, a strong academic program that will prepare them for post-secondary education. The school's strength and its future lie in its Catholic heritage, the diverse backgrounds of its students and faculty, and its high academic standards. Through a process of faith formation and challenging educational experiences, faculty and staff strive to empower students not only with academic and technological skills, but also with skills for living. Members of the Althoff Catholic High School community share a deep and abiding respect for the individual and are committed to the spiritual, moral, physical, social and intellectual development of the person. We foster the crusader spirit that exists in each of us to serve God and neighbor.

Source: Verified school update

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Frequently Asked Questions

How much does Althoff Catholic High School cost?

Althoff Catholic High School's tuition is approximately $8,262 for private students.

What schools are Althoff Catholic High School often compared to?

Althoff Catholic High School is often viewed alongside schools like Gibault Catholic by visitors of our site.

What is the acceptance rate of Althoff Catholic High School?

The acceptance rate of Althoff Catholic High School is 20%, which is lower than the national average of 85%. Althoff Catholic High School's acceptance rate is ranked among the top private schools in Illinois with low acceptance rates.

What sports does Althoff Catholic High School offer?

Althoff Catholic High School offers 15 interscholastic sports: Baseball, Basketball, Bowling, Cheering, Cross Country, Dance, Football, Golf, Soccer, Softball, Swimming, Tennis, Track and Field, Volleyball and Wrestling. Althoff Catholic High School is ranked as one of the top 20% of private schools in Illinois for most sports offered.

What is Althoff Catholic High School's ranking?

Althoff Catholic High School ranks among the top 20% of private schools in Illinois for: Lowest average acceptance rates, Largest student body and Most sports offered.

When is the application deadline for Althoff Catholic High School?

The application deadline for Althoff Catholic High School is rolling (applications are reviewed as they are received year-round).

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Did You Know?

The average private school tuition in St. Clair County, IL is $5,259 for elementary schools (read more about average private school tuition across the country).

The average acceptance rate in St. Clair County, IL is 85% (read more about average acceptance rates across the country).