Mater Dei, a Catholic, diocesan, regional high school, nurtures the spiritual, moral, intellectual, emotional, and social growth of young men and women.
In a caring environment, respectful of individual differences, her comprehensive program educates, fosters faith and develops gospel values.
Quick Facts (2026)
- Top-Ranked IL School
- Grades: 9-12
- Enrollment: 383 students
- Yearly Tuition: $6,310
- Average class size: 16 students
- Application Deadline: None / Rolling
- Source: Verified school update
Top Rankings
Mater Dei High School ranks among the top 20% of private schools in Illinois for:
School Overview
School Membership(s)School Assoc.
Religious Affiliation
Grades Offered
Grades 9-12
Year Founded
1954
Colors
White, Navy Blue, Columbia blue
School Calendar
Student Body
Total Students
383 students
Student Body Type
Co-ed
% Students of Color
5%
State avg.: 34%
Students by Grade
Academics and Faculty
Total Classroom Teachers
30 teachers
Student-Teacher Ratio
13:1
National avg.: 11:1
% Faculty w/Advanced Degree
50%
Average Class Size
16 students
Number of AP/Advanced Courses
2 courses
Average ACT score
24
(Out of 36)
Tuition and Acceptance Rate
Admission Deadline
None / Rolling
Yearly Tuition Cost
Application URL
Sports
Total Sports Offered
12 sports
School Notes
- Mater Dei, a Catholic, diocesan, regional high school, nurtures the spiritual, moral, intellectual, emotional, and social growth of young men and women. In a caring environment, respectful of individual differences, her comprehensive program educates, fosters faith and develops gospel values.
Source: Verified school update
Frequently Asked Questions
How much does Mater Dei High School cost?
Mater Dei High School's tuition is approximately $6,310 for private students.
What sports does Mater Dei High School offer?
Mater Dei High School offers 12 interscholastic sports: Baseball, Basketball, Bowling, Cheering, Cross Country, Football, Golf, Soccer, Softball, Swimming, Volleyball and Weightlifting. Mater Dei High School is ranked as one of the top 20% of private schools in Illinois for most sports offered.
What is Mater Dei High School's ranking?
Mater Dei High School ranks among the top 20% of private schools in Illinois for: Largest student body and Most sports offered.
When is the application deadline for Mater Dei High School?
The application deadline for Mater Dei High School is rolling (applications are reviewed as they are received year-round).
Nearby Private Schools
The nearest high school to Mater Dei High School is Christ Our Rock Lutheran High School (18.6 miles away)
The nearest elementary school and preschool is All Saints Academy (0.5 miles away)
Show me:
School
Location
Miles
Quick Facts
All Saints Academy
(Catholic)
295 N Clinton St
Breese, IL 62230
(618) 526-4323
Breese, IL 62230
(618) 526-4323
0.5 miles
Gr: PK-8 | 357 students Avg. class size: 17 students Tuition listed
St. Paul Catholic School
(Catholic)
1416 Main St
Highland, IL 62249
(618) 654-7525
Highland, IL 62249
(618) 654-7525
11.4 miles
Gr: PK-8 | 230 students
Immanuel Lutheran School
(Lutheran Church Missouri Synod)
606 S Hanover St
Okawville, IL 62271
(618) 243-6142
Okawville, IL 62271
(618) 243-6142
13.2 miles
Gr: PK-8 | 90 students Avg. class size: 8 students Sports: 7 Tuition & acceptance rate listed
8701 Huey Rd
Hoffman, IL 62250
(618) 495-2246
Hoffman, IL 62250
(618) 495-2246
15.5 miles
Gr: PK-8 | 64 students Sports: 4 | Extracurrculars: 3 Tuition listed
Holy Childhood Of Jesus School
(Catholic)
215 N John St
Mascoutah, IL 62258
(618) 566-2922
Mascoutah, IL 62258
(618) 566-2922
16.3 miles
Gr: PK-8 | 172 students
School
Location
Miles
Quick Facts
Christ Our Rock Lutheran High School
(Lutheran Church Missouri Synod)
9545 Shatuc Rd
Centralia, IL 62801
(618) 226-3315
Centralia, IL 62801
(618) 226-3315
18.6 miles
Gr: 9-12 | 108 students Avg. class size: 15 students Sports: 10
1111 E Highway 50
O Fallon, IL 62269
(618) 726-6040
O Fallon, IL 62269
(618) 726-6040
21.8 miles
Gr: K-12 | 281 students Avg. class size: 20 students Sports: 5 Tuition & acceptance rate listed
Maryville Christian School
(Baptist)
7110 State Rt. 162
Maryville, IL 62062
(618) 505-7000
Maryville, IL 62062
(618) 505-7000
23 miles
Gr: K-12 | 449 students
Father Mcgivney Catholic High School
(Catholic)
7190 Bouse Rd
Glen Carbon, IL 62034
(618) 401-4550
Glen Carbon, IL 62034
(618) 401-4550
23.1 miles
Gr: 9-12 | 263 students Tuition listed
5100 N Illinois St
Fairview Heights, IL 62208
(618) 825-0609
Fairview Heights, IL 62208
(618) 825-0609
24.3 miles
Gr: PK-12 | 35 students Avg. class size: 10 students Tuition & acceptance rate listed
School
Location
Miles
Quick Facts
All Saints Academy
(Catholic)
295 N Clinton St
Breese, IL 62230
(618) 526-4323
Breese, IL 62230
(618) 526-4323
0.5 miles
Gr: PK-8 | 357 students Avg. class size: 17 students Tuition listed
St. Paul Catholic School
(Catholic)
1416 Main St
Highland, IL 62249
(618) 654-7525
Highland, IL 62249
(618) 654-7525
11.4 miles
Gr: PK-8 | 230 students
Immanuel Lutheran School
(Lutheran Church Missouri Synod)
606 S Hanover St
Okawville, IL 62271
(618) 243-6142
Okawville, IL 62271
(618) 243-6142
13.2 miles
Gr: PK-8 | 90 students Avg. class size: 8 students Sports: 7 Tuition & acceptance rate listed
8701 Huey Rd
Hoffman, IL 62250
(618) 495-2246
Hoffman, IL 62250
(618) 495-2246
15.5 miles
Gr: PK-8 | 64 students Sports: 4 | Extracurrculars: 3 Tuition listed
Holy Childhood Of Jesus School
(Catholic)
215 N John St
Mascoutah, IL 62258
(618) 566-2922
Mascoutah, IL 62258
(618) 566-2922
16.3 miles
Gr: PK-8 | 172 students
School
Location
Miles
Quick Facts
All Saints Academy
(Catholic)
295 N Clinton St
Breese, IL 62230
(618) 526-4323
Breese, IL 62230
(618) 526-4323
0.5 miles
Gr: PK-8 | 357 students Avg. class size: 17 students Tuition listed
St. Paul Catholic School
(Catholic)
1416 Main St
Highland, IL 62249
(618) 654-7525
Highland, IL 62249
(618) 654-7525
11.4 miles
Gr: PK-8 | 230 students
Immanuel Lutheran School
(Lutheran Church Missouri Synod)
606 S Hanover St
Okawville, IL 62271
(618) 243-6142
Okawville, IL 62271
(618) 243-6142
13.2 miles
Gr: PK-8 | 90 students Avg. class size: 8 students Sports: 7 Tuition & acceptance rate listed
8701 Huey Rd
Hoffman, IL 62250
(618) 495-2246
Hoffman, IL 62250
(618) 495-2246
15.5 miles
Gr: PK-8 | 64 students Sports: 4 | Extracurrculars: 3 Tuition listed
Holy Childhood Of Jesus School
(Catholic)
215 N John St
Mascoutah, IL 62258
(618) 566-2922
Mascoutah, IL 62258
(618) 566-2922
16.3 miles
Gr: PK-8 | 172 students
School
(Math and Reading Proficiency)
(Math and Reading Proficiency)
Location
Miles
Quick Facts
Estelle Kampmeyer Elementary School
(Math: 41% | Reading: 45%)
Rank:
Rank:
9/
Top 20%10
707 N Smiley St
O Fallon, IL 62269
(618) 632-6391
O Fallon, IL 62269
(618) 632-6391
8890.6 miles
Gr: PK-5 | 465 students Student-Teacher Ratio: 16:1 Minority enrollment: 29%
O Fallon High School
(Math: 36% | Reading: 42%)
Rank:
Rank:
8/
Top 30%10
600 S Smiley St
O Fallon, IL 62269
(618) 632-3507
O Fallon, IL 62269
(618) 632-3507
8890.6 miles
Gr: 9-12 | 2,540 students Student-Teacher Ratio: 16:1 Minority enrollment: 41%
Shiloh Middle School
(Math: 33% | Reading: 46%)
Rank:
Rank:
8/
Top 30%10
1 Wildcat Xing
O Fallon, IL 62269
(618) 632-7434
O Fallon, IL 62269
(618) 632-7434
8890.6 miles
Gr: 4-8 | 331 students Student-Teacher Ratio: 17:1 Minority enrollment: 40%
Laverna Evans Elementary School
(Math: 35-39% | Reading: 35-39%)
Rank:
Rank:
8/
Top 30%10
802 Dartmouth Dr
O Fallon, IL 62269
(618) 632-3335
O Fallon, IL 62269
(618) 632-3335
8890.8 miles
Gr: PK-5 | 421 students Student-Teacher Ratio: 20:1 Minority enrollment: 51%
Shiloh Elementary School
(Math: 40-49% | Reading: 30-34%)
Rank:
Rank:
8/
Top 30%10
125 Diamond Ct
O Fallon, IL 62269
(618) 632-7434
O Fallon, IL 62269
(618) 632-7434
8890.8 miles
Gr: PK-3 | 245 students Student-Teacher Ratio: 13:1 Minority enrollment: 34%
School Reviews
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