Mississippi Valley Christian School Photo

Best Alton Private Schools (2026)

For the 2026 school year, there are 7 private schools serving 1,005 students in Alton, IL (there are 9 public schools, serving 4,644 public students). 18% of all K-12 students in Alton, IL are educated in private schools (compared to the IL state average of 12%).
The top-ranked private schools in Alton, IL include St. Mary's School, St. Mary School, and Marquette Catholic High School.
The average acceptance rate is 99%, which is higher than the Illinois private school average acceptance rate of 85%.
71% of private schools in Alton, IL are religiously affiliated (most commonly Catholic and Baptist).

Top-Ranked Alton Private 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 School
(Catholic)
536 E 3rd St
Alton, IL 62002
(618) 465-8523
Gr: PK-8 | 337 students Avg. class size: 15 students Tuition 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
New Vision Christian Academy
Alternative School (Pentecostal)
512 Spring St
Alton, IL 62002
(618) 979-9357
Gr: PK-8 | 11 students
Toddle Towne Learning Center
Daycare / Preschool
3839 Humbert Road
Alton, IL 62002
(618) 462-8852
Gr: NS-PK | 53 students
[+] 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
7 Schools

Student Body:

# Students
1,005 Students
252,129 Students
% Average Students of Color
27%
34%

Academics and Faculty:

# Teachers
82 Teachers
18,877 Teachers
Average Student-Teacher Ratio
12:1
13:1
% Average Faculty w/Advanced Degree
32%
53%
Average Class Size
15 students
16 students
Average Number of AP Courses
9 courses
10 courses
Average ACT score
22
(Out of 36)
25

Tuition and Acceptance Rate:

Average Yearly Tuition Cost
$10,925
$12,512
Average Summer Program Cost
$150
$943
Average % on Financial Aid
54%
34%
Average Acceptance Rate
99%
85%
Average Endowment Size
$50 million
$49.13 million

Students by Ethnicity:

0.54
0.66
# American Indian Students
1 Student
605 Students
% American Indian Students
n/a
n/a
# Asian Students
7 Students
10,504 Students
% Asian Students
1%
4%
# Hispanic Students
103 Students
25,130 Students
% Hispanic Students
10%
10%
# Black Students
114 Students
21,075 Students
% Black Students
11%
9%
# White Students
676 Students
129,117 Students
% White Students
65%
51%
# Hawaiian Students
n/a
338 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
137 Students
65,550 Students
% of Others Students
13%
26%
All Ethnic Groups

Extracurriculars and Sports:

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

Frequently Asked Questions

What are the top-ranked private schools in Alton, IL?
The top-ranked private schools in Alton, IL include St. Mary's School, St. Mary School, and Marquette Catholic High School.
How many private schools are located in Alton?
7 private schools are located in Alton.
How diverse are private schools in Alton?
Alton private schools are approximately 27% minority students, which is lower than the Illinois private school average of 34%.
What percentage of students in Alton go to private school?
18% of all K-12 students in Alton are educated in private schools (compared to the IL state average of 12%).
What percentage of private schools are religiously affiliated in Alton?
71% of private schools in Alton are religiously affiliated (most commonly Catholic and Baptist).
Which private schools in Alton are often viewed compared to one another?

Recent Articles

Financial Aid 101 for Private School Families 2026
Financial Aid 101 for Private School Families 2026
Guide to private school financial aid in 2026, with current costs, key planning timelines and practical steps parents need to maximize aid options.
Why Extracurricular Activities Matter in 2026
Why Extracurricular Activities Matter in 2026
Discover why extracurricular activities remain essential in 2026, with updated research, costs, and admissions insights for parents and students.
How to Appeal for Financial Aid After Admission
How to Appeal for Financial Aid After Admission
Learn how to appeal for financial aid after admission to a private school, with expert steps, timelines, and 2026 updates for families.