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.
Quick Facts (2025-26)
- 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
Top Rankings
Althoff Catholic High School ranks among the top 20% of private schools in Illinois for:
Category
Attribute
Acceptance Rate
Student Body
Sports offered
School Overview
Religious Affiliation
Grades Offered
Grades 9-12
ADD/ADHD Support
Yes
Learning Difference Programs
Yes
Learning Programs Supported
Mild Learning Differences
Year Founded
1965
Colors
Gold, Blue, Navy Blue
Last Day of School
Mon. May 25, 2026
Student Body
Total Students
323 students
Student Body Type
Co-ed
% Students of Color
30%
State avg.: 34%
Students by Grade
Academics and Faculty
Total Classroom Teachers
28 teachers
Student-Teacher Ratio
12:1
National avg.: 13:1
Average Class Size
15 students
Number of AP Courses
8 courses
List of Courses Offered
Matriculation DataMatric. Data
Classroom Dress Code
Formal
Skirts and khaki pants, polos
Tuition and Acceptance Rate
Admission Deadline
None / Rolling
Yearly Tuition Cost
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.: 81%
College Acceptance Rate
95%
Admissions Director
Reeta Piirala-Skoglund
Application URL
Sports
Total Sports Offered
15 sports
Extracurriculars
Total ExtracurricularsTotal Extra-curric.
9 extracurriculars
ExtracurricularsExtra-curric.
Club or Organization:
Arts and Music Programs:
Recreational Athletic Programs:
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
- School Mascot: Crusaders
- 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
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 84%. 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).
School Calendar
View the Althoff Catholic High School yearly calendar below. Note key dates such as:
Event
Date
Last Day to Drop/Add Courses
January 09, 2026 (Friday)
Seniors Last Day to Drop/Add Courses
January 30, 2026 (Friday)
Related Schools
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Popular comparisons: Althoff Catholic High School vs. Gibault Catholic
People that viewed Althoff Catholic High School also viewed these schools: Peoria Notre Dame High School, Illiana Christian High School, Aquin Catholic Junior Senior High School, Christian Heritage Academy and Lake Forest Academy.
The nearest high school to Althoff Catholic High School is Governor French Academy (3.3 miles away)
The nearest elementary school is St. Henry Elementary School (0.1 miles away)
The nearest preschool is Our Lady Queen Of Peace School (0.4 miles away)
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School
Location
Miles
Quick Facts
5105 N Sheridan Road
Peoria, IL 61614
(309) 691-8741
Peoria, IL 61614
(309) 691-8741
153.8 miles
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(219) 558-7066
Lansing, IL 60438
(219) 558-7066
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Aquin Catholic Junior Senior High School
(Catholic)
1419 S Galena Ave
Freeport, IL 61032
(815) 235-3154
Freeport, IL 61032
(815) 235-3154
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315 Waukegan Road
Northfield, IL 60093
(847) 446-5252
Northfield, IL 60093
(847) 446-5252
272.3 miles
Gr: PK-12 | 437 students Avg. class size: 17 students Sports: 5 | Extracurrculars: 15 Tuition & acceptance rate listed
1500 W Kennedy Rd
Lake Forest, IL 60045
(847) 615-3257
Lake Forest, IL 60045
(847) 615-3257
279.1 miles
Gr: 9-12 | 452 students Avg. class size: 12 students Sports: 15 | Extracurrculars: 24 Tuition & acceptance rate listed
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