St. Mary School Photo

Best Marion County Private Schools (2026)

For the 2026 school year, there are 5 private schools serving 461 students in Marion County, IL (there are 31 public schools, serving 6,311 public students). 7% of all K-12 students in Marion County, IL are educated in private schools (compared to the IL state average of 12%).
The top-ranked private schools in Marion County, IL include St. Mary School and New Horizon Christian School.
100% of private schools in Marion County, IL are religiously affiliated (most commonly Catholic and Lutheran Church Missouri Synod).

Top-Ranked Marion County Private Schools (2026)

School
Location
Quick Facts
New Horizon Christian School
(Christian)
12 Greenview Church Road
Centralia, IL 62801
(618) 533-6910
Gr: K-8 | 125 students Avg. class size: 12 students Sports: 5 | Extracurrculars: 1
St. Mary School
St. Mary School Photo
(Catholic)
424 E. Broadway
Centralia, IL 62801
(618) 532-3473
Gr: PK-8 | 114 students Avg. class size: 20 students Sports: 6 Tuition listed
Christ Our Rock Lutheran High School
(Lutheran Church Missouri Synod)
9545 Shatuc Rd
Centralia, IL 62801
(618) 226-3315
Gr: 9-12 | 108 students Avg. class size: 15 students Sports: 10
St. Theresa Of Avila
(Catholic)
190 N Ohio Ave
Salem, IL 62881
(618) 548-3492
Gr: NS-8 | 53 students Sports: 3 | Extracurrculars: 2
Trinity Lutheran School
(Lutheran Church Missouri Synod)
203 S Pleasant Ave
Centralia, IL 62801
(618) 532-5434
Gr: PK-8 | 61 students Tuition listed

Overview

This County (Marion County)
This State (IL)
# Schools
5 Schools

Student Body:

# Students
461 Students
252,129 Students
% Average Students of Color
38%
34%

Academics and Faculty:

# Teachers
36 Teachers
18,877 Teachers
Average Student-Teacher Ratio
13:1
13:1
% Average Faculty w/Advanced Degree
20%
53%
Average Class Size
16 students
16 students
Average Number of AP Courses
15 courses
10 courses
Average ACT score
25
(Out of 36)
25

Tuition and Acceptance Rate:

Average Yearly Tuition Cost
$24,500
$12,512
Average % on Financial Aid
20%
34%

Students by Ethnicity:

0.65
0.66
# American Indian Students
n/a
605 Students
% American Indian Students
n/a
n/a
# Asian Students
137 Students
10,504 Students
% Asian Students
29%
4%
# Hispanic Students
7 Students
25,130 Students
% Hispanic Students
1%
10%
# Black Students
15 Students
21,075 Students
% Black Students
3%
9%
# White Students
233 Students
129,117 Students
% White Students
49%
51%
# Hawaiian Students
3 Students
338 Students
% Hawaiian Students
1%
n/a
# Two or more races Students
n/a
n/a
% of Two or more races Students
n/a
n/a
# Others Students
80 Students
65,550 Students
% of Others Students
17%
26%
All Ethnic Groups

Extracurriculars and Sports:

Average Number of Extracurriculars
2 extracurriculars
9 extracurriculars
Average Number of Sports
6 sports
6 sports

Frequently Asked Questions

What are the top-ranked private schools in Marion County, IL?
The top-ranked private schools in Marion County, IL include St. Mary School and New Horizon Christian School.
How many private schools are located in Marion County?
5 private schools are located in Marion County.
How diverse are private schools in Marion County?
Marion County private schools are approximately 38% minority students, which is higher than the Illinois private school average of 34%.
What percentage of students in Marion County go to private school?
7% of all K-12 students in Marion County are educated in private schools (compared to the IL state average of 12%).
What percentage of private schools are religiously affiliated in Marion County?
100% of private schools in Marion County are religiously affiliated (most commonly Catholic and Lutheran Church Missouri Synod).
Which private schools in Marion County are often viewed compared to one another?

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