Private School Review - Established 2003

Best Williamson County Private Schools (2026-27)

For the 2026-27 school year, there are 4 private schools serving 562 students in Williamson County, IL (there are 24 public schools, serving 9,716 public students). 5% of all K-12 students are educated in private schools (compared to the IL state average of 12%).
100% of private schools in Williamson County, IL are religiously affiliated (most commonly Christian and Seventh Day Adventist).

Quick Facts (2026-27)

Quick Facts (2026-27)

Top Ranked Williamson County Private Schools (2026-27)

Map of Our Lady Of Mt Carmel School
Our Lady Of Mt Carmel School
Gr: PK-8 | 256 students
Catholic
300 W Monroe St
Herrin, IL 62948
(618) 942-4484
View Profile
Map of Agape Christian High School
Agape Christian High School
Gr: 9-12 | 77 students
Christian
5208 Meadowland Pkwy
Marion, IL 62959
(618) 997-9302
View Profile
Map of Marion Adventist School
Marion Adventist School
Gr: PK-5 | 12 students
Seventh Day Adventist
9314 Old Route 13
Marion, IL 62959
(618) 997-1430
View Profile
Unity Christian School Photo
Unity Christian School
Gr: PK-8 | 217 students
Avg. class size: 15 students
Sports: 7 | Extracurriculars: 3
Christian
100 E College St
Energy, IL 62933
(618) 542-3802
View Profile

Overview

Category
This State (IL)
US
# Schools
4 Schools

Trends in Total Number of Private Schools

YearWilliamson County Total Schools
20254
20244
20234
20224
20214
20206
20195
20185
20175
20165
20155
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Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

# Students
562 Students
251,321 Students

Trends in the Average Number of Students Per Private School

YearWilliamson County AverageIllinois (IL) AverageNational Average
2025141166179
2024141162172
2023145171174
2022134178185
2021134174180
202098168171
2019113174175
2018113171172
2017129177180
2016129175178
2015130168167
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% Average Students of Color
5%
34%

Percentage of Students of Color Trends (2015-2025)

YearWilliamson County AverageIllinois (IL) AverageNational Average
20255%34%34%
20245%34%34%
20237%34%33%
20228%34%33%
20218%34%32%
20208%35%32%
20198%33%31%
20188%33%31%
20179%34%32%
20169%34%32%
20159%35%32%
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Academics and Faculty:

# Teachers
41 Teachers
18,870 Teachers
Average Student-Teacher Ratio
14:1
13:1

Student-Teacher Ratio Trends (2015-2025)

YearWilliamson County AverageIllinois (IL) AverageNational Average
202514:113:111:1
202414:113:111:1
202314:113:111:1
202211:113:111:1
202111:113:111:1
202011:113:112:1
201911:113:112:1
201811:114:112:1
201713:114:112:1
201613:114:112:1
201513:114:112:1
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% Average Faculty w/Advanced Degree
15%
53%

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

YearWilliamson County AverageIllinois (IL) AverageNational Average
202515%53%55%
202415%52%54%
202315%50%54%
202215%51%54%
202115%50%54%
202015%50%54%
201915%50%53%
201815%49%53%
201715%48%53%
201615%49%52%
201515%50%52%
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Average Class Size
15 students
16 students

Class Size Trends (2015-2025)

YearWilliamson County AverageIllinois (IL) AverageNational Average
2025151615
2024151715
2023151715
2022151715
2021151715
2020151715
2019181715
2018181715
2017181715
2016181715
2015181715
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Tuition and Acceptance Rate:

Average Yearly Tuition Cost
$4,500
$12,436

Tuition Cost Trends (2015-2025)

YearWilliamson County AverageIllinois (IL) AverageNational Average
2025$4,500$12,671$15,012
2024$4,500$9,594$13,254
2023$4,500$8,924$12,626
2022$4,500$8,609$12,187
2021$4,500$8,334$11,800
2020$4,500$8,312$11,512
2019$4,150$8,068$11,293
2018$4,150$7,898$11,017
2017$4,150$7,863$10,708
2016$3,900$7,289$10,356
2015$3,800$7,003$9,939
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Students by Ethnicity:

0.40
0.66

Diversity Score Trends

YearWilliamson County AverageIllinois (IL) AverageNational Average
20250.400.660.65
20240.400.660.65
20230.410.660.65
20220.520.650.64
20210.520.650.64
20200.530.660.64
20190.530.650.63
20180.530.650.63
20170.540.620.61
20160.540.620.61
20150.540.630.61
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# American Indian Students
n/a
605 Students
% American Indian Students
n/a
n/a
# Asian Students
10 Students
10,480 Students
% Asian Students
2%
4%

Asian Student Percentage Trends

YearWilliamson County AverageIllinois (IL) AverageNational Average
20252%5%5%
20242%5%5%
20233%5%5%
20223%4%4%
20213%5%4%
20202%4%4%
20192%4%4%
20182%5%4%
20174%4%4%
20164%3%4%
20154%4%4%
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# Hispanic Students
6 Students
25,032 Students
% Hispanic Students
1%
10%

Hispanic Student Percentage Trends

YearWilliamson County AverageIllinois (IL) AverageNational Average
20251%10%9%
20241%10%9%
20231%10%9%
20223%10%8%
20213%10%9%
20203%10%9%
20193%9%8%
20183%9%8%
20172%9%8%
20162%9%8%
20152%9%8%
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# Black Students
7 Students
21,046 Students
% Black Students
1%
9%

Black Student Percentage Trends

YearWilliamson County AverageIllinois (IL) AverageNational Average
20251%8%7%
20241%8%7%
20232%8%8%
20221%8%7%
20211%8%7%
20201%9%8%
20191%9%7%
20181%9%7%
20171%9%7%
20161%9%7%
20151%9%8%
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# White Students
422 Students
128,859 Students
% White Students
75%
51%

White Student Percentage Trends

YearWilliamson County AverageIllinois (IL) AverageNational Average
202575%51%52%
202475%51%52%
202375%51%52%
202261%53%54%
202161%52%54%
202060%52%54%
201961%53%56%
201861%53%56%
201759%56%58%
201659%56%58%
201558%55%58%
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# Hawaiian Students
1 Student
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
116 Students
65,474 Students
% of Others Students
21%
26%

Other Races Student Percentage Trends

YearWilliamson County AverageIllinois (IL) AverageNational Average
202521%26%26%
202421%26%26%
202319%26%25%
202232%25%25%
202132%25%25%
202034%25%24%
201933%25%24%
201833%24%23%
201734%22%22%
201634%23%22%
201535%23%21%
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Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

All Ethnic Groups

Extracurriculars and Sports:

Average Number of Extracurriculars
3 extracurriculars
9 extracurriculars
Average Number of Sports
7 sports
6 sports

Frequently Asked Questions

What are the top ranked private schools in Williamson County, IL?
The top ranked private schools in Williamson County, IL is Our Lady Of Mt Carmel School.
How many private schools are located in Williamson County?
4 private schools are located in Williamson County.
What percentage of students in Williamson County go to private school?
5% of all K-12 students in Williamson County are educated in private schools (compared to the IL state average of 12%).
What percentage of private schools are religiously affiliated in Williamson County?
100% of private schools in Williamson County are religiously affiliated (most commonly Christian and Seventh Day Adventist).
Which private schools in Williamson County are often viewed compared to one another?

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