Top Ranked Alton Private High Schools (2026-27)

Center For Children To Heal And Achieve (ccha)

Gr: 2-12 | 46 students

Special Education School

1400 State St

Alton, IL 62002

(618) 465-3594

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Marquette Catholic High School

Gr: 9-12 | 390 students

Avg. class size: 20 students

Sports: 14 | Extracurriculars: 13

Catholic

219 E 4th St

Alton, IL 62002

(618) 463-0580

(1)

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St. Mary's School

Gr: 7-9 | 82 students

Catholic

1015 Milton Rd

Alton, IL 62002

(618) 465-9719

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Mississippi Valley Christian School

Gr: PK-12 | 86 students

Avg. class size: 10 students

Sports: 3 | Extracurriculars: 2

Baptist

2009 Seminary Street

Alton, IL 62002

(618) 462-1071

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[+] Show Closed Private Schools in Alton, Illinois

Alton, Illinois Private Schools (Closed)

Ss Peter & Paul Elementary School

Gr: PK-8 | 79 students

Catholic

801 State St

Alton, IL 62002

(618) 465-8711

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Alton, IL Private School Trends (10-Year)

Private Schools

604

Students

-9.3% (-62 students) 10-yr

$12,673

Avg. Tuition

+295.5% (+$9,469) 10-yr

Avg. Class Size

+25.0% (+3 students) 10-yr

14%

Students of Color

-12.5% (-2.0 pp) 10-yr

11:1

Student-Teacher Ratio

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Enrollment & Diversity

Category

This Town (Alton)

This State (IL)

# Schools

4 Schools

389 Schools

# Students

604 Students

89,941 Students

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Trends in the Average Number of Students Per Private High School
Year	Alton, IL Avg	Illinois (IL)	National
2025	151	238	253
2024	148	230	245
2023	156	248	247
2022	155	255	257
2021	155	247	249
2020	154	233	235
2019	176	252	242
2018	179	243	238
2017	165	239	246
2016	167	238	241
2015	167	230	220

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% Students of Color

14%

35%

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Percentage of Students of Color Trends (2015-2025)
Year	Alton, IL Avg	Illinois (IL)	National
2025	14%	35%	32%
2024	14%	35%	31%
2023	15%	34%	31%
2022	23%	34%	30%
2021	23%	34%	30%
2020	14%	34%	29%
2019	17%	32%	29%
2018	16%	33%	28%
2017	14%	34%	30%
2016	16%	35%	30%
2015	16%	34%	30%

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0.30

0.62

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Diversity Score Trends
Year	Alton, IL Avg	Illinois (IL)	National
2025	0.30	0.62	0.61
2024	0.30	0.62	0.60
2023	0.29	0.62	0.60
2022	0.27	0.60	0.58
2021	0.27	0.60	0.57
2020	0.27	0.61	0.57
2019	0.28	0.60	0.56
2018	0.29	0.58	0.55
2017	0.28	0.56	0.54
2016	0.28	0.56	0.54
2015	0.28	0.57	0.53

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Show more data/charts: racial breakdown

# American Indian Students

1 Student

298 Students

% American Indian Students

n/a

# Asian Students

7 Students

5,624 Students

% Asian Students

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Asian Student Percentage Trends
Year	Alton, IL Avg	Illinois (IL)	National
2025	2%	7%	5%
2024	2%	7%	6%
2023	1%	8%	6%
2022	2%	8%	5%
2021	2%	7%	5%
2020	2%	7%	5%
2019	1%	6%	5%
2018	1%	7%	5%

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# Hispanic Students

7 Students

10,091 Students

% Hispanic Students

11%

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Hispanic Student Percentage Trends
Year	Alton, IL Avg	Illinois (IL)	National
2025	1%	11%	9%
2024	1%	11%	9%
2023	1%	11%	8%
2019	1%	9%	8%
2018	1%	10%	8%
2017	2%	10%	7%
2016	2%	9%	8%
2015	2%	9%	8%

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# Black Students

63 Students

9,671 Students

% Black Students

10%

11%

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Black Student Percentage Trends
Year	Alton, IL Avg	Illinois (IL)	National
2025	10%	11%	8%
2024	10%	11%	8%
2023	12%	10%	8%
2022	11%	10%	8%
2021	11%	11%	8%
2020	11%	11%	8%
2019	14%	11%	8%
2018	14%	11%	8%
2017	13%	11%	8%
2016	13%	12%	8%
2015	13%	12%	9%

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# White Students

531 Students

52,469 Students

% White Students

83%

58%

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White Student Percentage Trends
Year	Alton, IL Avg	Illinois (IL)	National
2025	83%	58%	59%
2024	83%	58%	60%
2023	84%	58%	60%
2022	85%	60%	62%
2021	85%	60%	63%
2020	85%	60%	64%
2019	84%	61%	64%
2018	83%	62%	65%
2017	84%	64%	66%
2016	84%	64%	66%
2015	84%	63%	66%

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# Hawaiian Students

n/a

105 Students

% Hawaiian Students

n/a

# Two or more races Students

n/a

% of Two or more races Students

n/a

# Others Students

28 Students

12,216 Students

% of Others Students

14%

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Other Races Student Percentage Trends
Year	Alton, IL Avg	Illinois (IL)	National
2025	4%	13%	17%
2024	4%	13%	15%
2023	2%	13%	16%
2022	2%	12%	16%
2021	2%	12%	15%
2020	2%	12%	14%
2018	1%	10%	13%
2017	1%	11%	14%
2016	1%	11%	13%
2015	1%	11%	12%

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All Ethnic Groups

Academics

# Teachers

56 Teachers

7,571 Teachers

Average Student-Teacher Ratio

11:1

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Student-Teacher Ratio Trends (2015-2025)
Year	Alton, IL Avg	Illinois (IL)	National
2025	11:1	11:1	10:1
2024	11:1	11:1	10:1
2023	11:1	11:1	10:1
2022	11:1	11:1	10:1
2021	11:1	11:1	10:1
2020	11:1	11:1	10:1
2019	11:1	11:1	10:1
2018	11:1	12:1	10:1
2017	11:1	12:1	10:1
2016	11:1	12:1	10:1
2015	11:1	12:1	10:1

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% Average Faculty w/Advanced Degree

32%

56%

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Percentage of Faculty With Advanced Degrees Trends (2015-2025)
Year	Alton, IL Avg	Illinois (IL)	National
2025	32%	56%	57%
2024	32%	55%	57%
2023	32%	54%	57%
2022	32%	55%	56%
2021	32%	55%	56%
2020	3%	54%	56%
2019	3%	54%	55%
2018	3%	53%	55%
2017	3%	54%	55%
2016	3%	54%	54%
2015	3%	55%	54%

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Average Class Size

15 students

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Class Size Trends (2015-2025)
Year	Alton, IL Avg	Illinois (IL)	National
2025	15	15	14
2024	15	15	14
2023	15	15	14
2022	15	15	14
2021	15	15	14
2020	14	15	14
2019	14	15	14
2018	10	16	14
2017	10	16	14
2016	12	16	14
2015	12	16	14

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Average Number of AP Courses

8 courses

12 courses

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Trends in Average Number of AP Courses Offered
Year	Alton, IL Avg	Illinois (IL)	National
2025	9	11	13
2024	7	9	12
2023	5	9	12
2022	5	9	12
2021	5	9	12

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Average ACT score

(Out of 36)

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ACT Score Trends (2015-2025)
Year	Alton, IL Avg	Illinois (IL)	National
2025	22	25	26
2024	22	25	26
2023	22	25	26
2022	22	25	26
2021	22	25	26
2020	22	25	26
2019	22	25	25
2018	22	25	25
2017	22	25	25
2016	22	24	25
2015	22	24	25

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Tuition & Aid

Average Yearly Tuition Cost

$12,673

$15,812

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Tuition Cost Trends (2015-2025)
Year	Alton, IL Avg	Illinois (IL)	National
2025	$12,523	$15,731	$17,997
2024	$6,112	$14,197	$17,011
2023	$5,744	$13,364	$16,191
2022	$5,644	$12,798	$15,821
2021	$5,644	$12,234	$15,331
2020	$5,532	$12,456	$15,046
2019	$5,310	$11,771	$14,791
2018	$3,204	$11,798	$14,527
2017	$3,204	$11,717	$14,161
2016	$3,204	$10,185	$13,713
2015	$3,204	$9,775	$13,065

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Average Summer Program Cost

$150

$1,192

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Summer Program Cost Trends (2022-2025)
Year	Alton, IL Avg	Illinois (IL)	National
2025	$150	$1,192	$1,513
2024	$150	$1,168	$1,498
2023	$125	$1,323	$1,623
2022	$125	$1,557	$1,473

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Average % on Financial Aid

56%

40%

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Percent on Financial Aid Trends (2019-2025)
Year	Alton, IL Avg	Illinois (IL)	National
2025	54%	39%	38%
2024	54%	38%	37%
2023	54%	37%	36%
2022	54%	37%	36%
2021	54%	38%	36%
2020	54%	38%	35%
2019	54%	37%	34%

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Average Endowment Size

$50 million

$36.75 million

Admissions & Athletics

Average Acceptance Rate

99%

81%

View Data

Acceptance Rate Trends (2015-2025)
Year	Alton, IL Avg	Illinois (IL)	National
2025	99%	82%	79%
2024	99%	85%	81%
2023	99%	86%	81%
2022	99%	87%	81%
2021	99%	87%	81%
2020	99%	87%	81%
2019	99%	86%	81%
2018	99%	86%	80%
2017	99%	86%	81%
2016	99%	89%	80%
2015	99%	88%	81%

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Average Number of Extracurriculars

8 extracurriculars

14 extracurriculars

Average Number of Sports

9 sports

Frequently Asked Questions

What are the top ranked private high schools in Alton, IL?

The 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, Mississippi Valley Christian School vs. Marquette Catholic High School

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Quick Facts (2026-27)

Quick Facts (2026-27)

Top Ranked Alton Private High Schools (2026-27)

Alton, Illinois Private Schools (Closed)

Alton, IL Private School Trends (10-Year)

Trends in the Average Number of Students Per Private High School

Percentage of Students of Color Trends (2015-2025)

Diversity Score Trends

Asian Student Percentage Trends

Hispanic Student Percentage Trends

Black Student Percentage Trends

White Student Percentage Trends

Other Races Student Percentage Trends

Student-Teacher Ratio Trends (2015-2025)

Percentage of Faculty With Advanced Degrees Trends (2015-2025)

Class Size Trends (2015-2025)

Trends in Average Number of AP Courses Offered

ACT Score Trends (2015-2025)

Tuition Cost Trends (2015-2025)

Summer Program Cost Trends (2022-2025)

Percent on Financial Aid Trends (2019-2025)

Acceptance Rate Trends (2015-2025)

Frequently Asked Questions

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