Mississippi Valley Christian School Photo

Best Alton Private High Schools (2026)

For the 2026 school year, there are 4 private high schools serving 604 students in Alton, IL.
The top-ranked private high schools in Alton, IL include St. Mary's School, Center For Children To Heal And Achieve (ccha), and Marquette Catholic High School.
The average acceptance rate is 99%, which is higher than the Illinois private high school average acceptance rate of 82%.
75% of private high schools in Alton, IL are religiously affiliated (most commonly Catholic and Baptist).

Top-Ranked Alton Private High Schools (2026)

School
Location
Quick Facts
Center For Children To Heal And Achieve (ccha)
Special Education School
1400 State St
Alton, IL 62002
(618) 465-3594
Gr: 2-12 | 46 students
Marquette Catholic High School
(Catholic)
(1)
219 E 4th St
Alton, IL 62002
(618) 463-0580
Gr: 9-12 | 390 students Avg. class size: 20 students Sports: 13 | Extracurrculars: 13 Tuition & acceptance rate listed
St. Mary's School
(Catholic)
1015 Milton Rd
Alton, IL 62002
(618) 465-9719
Gr: 7-9 | 82 students Tuition listed
2009 Seminary Street
Alton, IL 62002
(618) 462-1071
Gr: PK-12 | 86 students Avg. class size: 10 students Sports: 3 | Extracurrculars: 2 Tuition & acceptance rate listed
[+] Show Closed Private Schools in Alton, Illinois

Alton, Illinois Private Schools (Closed)

School
Location
Quick Facts
801 State St
Alton, IL 62002
(618) 465-8711
Gr: PK-8 | 79 students

Overview

This Town (Alton)
This State (IL)
# Schools
4 Schools

Student Body:

# Students
604 Students
89,657 Students
% Average Students of Color
14%
35%

Academics and Faculty:

# Teachers
56 Teachers
7,473 Teachers
Average Student-Teacher Ratio
11:1
11:1
% Average Faculty w/Advanced Degree
32%
56%
Average Class Size
15 students
15 students
Average Number of AP Courses
9 courses
11 courses
Average ACT score
22
(Out of 36)
25

Tuition and Acceptance Rate:

Average Yearly Tuition Cost
$12,523
$15,731
Average Summer Program Cost
$150
$1,192
Average % on Financial Aid
54%
39%
Average Acceptance Rate
99%
82%
Average Endowment Size
$50 million
$57.83 million

Students by Ethnicity:

0.30
0.62
# American Indian Students
1 Student
298 Students
% American Indian Students
n/a
1%
# Asian Students
7 Students
5,619 Students
% Asian Students
1%
6%
# Hispanic Students
7 Students
10,085 Students
% Hispanic Students
1%
11%
# Black Students
63 Students
9,670 Students
% Black Students
10%
11%
# White Students
531 Students
52,424 Students
% White Students
83%
58%
# Hawaiian Students
n/a
105 Students
% Hawaiian Students
n/a
n/a
# Two or more races Students
n/a
n/a
% of Two or more races Students
n/a
n/a
# Others Students
28 Students
11,955 Students
% of Others Students
5%
13%
All Ethnic Groups

Extracurriculars and Sports:

Average Number of Extracurriculars
8 extracurriculars
14 extracurriculars
Average Number of Sports
8 sports
9 sports

Frequently Asked Questions

What are the top-ranked private high schools in Alton, IL?
The top-ranked private high schools in Alton, IL include St. Mary's School, Center For Children To Heal And Achieve (ccha), and Marquette Catholic High School.
How many private high schools are located in Alton?
4 private high schools are located in Alton.
What percentage of private high schools are religiously affiliated in Alton?
75% of private high schools in Alton are religiously affiliated (most commonly Catholic and Baptist).
Which private high schools in Alton are often viewed compared to one another?
Popular comparisons of private high schools in Alton include: Marquette Catholic High School vs. Mississippi Valley Christian School

Recent Articles

Free Private Schools & Voucher Programs in 2025
Free Private Schools & Voucher Programs in 2025
Updated guide to free private schools and school voucher programs, 2025 policies, costs, equity issues, and how families access tuition support.
Social Emotional Learning 2025: Policy, Practice and Outcomes
Social Emotional Learning 2025: Policy, Practice and Outcomes
Updated 2025 review of social emotional learning in schools, research outcomes, key trends, challenges and future paths for parents and educators.
Private School Admissions for Siblings: Costs and Timing
Private School Admissions for Siblings: Costs and Timing
Learn how private school admissions for siblings affect costs, discounts, and timing strategies for families planning multiple enrollments.