For the 2025-26 school year, there are 7 private high schools serving 881 students in St. Clair County, IL.
The top-ranked private high schools in St. Clair County, IL include First Baptist Academy and Althoff Catholic High School.
The average acceptance rate is 73%, which is lower than the Illinois private high school average acceptance rate of 82%.
Top-Ranked St. Clair County Private High Schools (2025-26)
School
Location
Quick Facts
Althoff Catholic High School![Althoff Catholic High School Photo]( "Althoff Catholic High School Photo")
(Catholic)
5401 W Main St
Belleville, IL 62226
(618) 235-1100
Belleville, IL 62226
(618) 235-1100
Gr: 9-12 | 323 students Avg. class size: 15 students Sports: 15 | Extracurrculars: 9 Tuition & acceptance rate listed
1111 E Highway 50
O Fallon, IL 62269
(618) 726-6040
O Fallon, IL 62269
(618) 726-6040
Gr: K-12 | 281 students Avg. class size: 20 students Sports: 5 Tuition & acceptance rate listed
5100 N Illinois St
Fairview Heights, IL 62208
(618) 825-0609
Fairview Heights, IL 62208
(618) 825-0609
Gr: PK-12 | 35 students Avg. class size: 10 students Tuition & acceptance rate listed
219 West Main Street
Belleville, IL 62220
(618) 233-7542
Belleville, IL 62220
(618) 233-7542
Gr: PK-12 | 107 students Avg. class size: 15 students Sports: 4 | Extracurrculars: 7 Tuition & acceptance rate listed
Illinois Center For Autism
Special Education School
1306 Wabash Ave
Belleville, IL 62220
(618) 398-7500
Belleville, IL 62220
(618) 398-7500
Gr: PK-12 | 99 students Avg. class size: 12 students
Jtc Academy
Special Education School
4850 Market St
East Saint Louis, IL 62207
(618) 398-2524
East Saint Louis, IL 62207
(618) 398-2524
Gr: 8-12 | 24 students
Jtc Boys Academy
Special Education School
353 N 88th St Hwy 157
East Saint Louis, IL 62203
(618) 398-2524
East Saint Louis, IL 62203
(618) 398-2524
Gr: 8-12 | 12 students
St. Clair County Private Schools (Closed)
School
Location
Quick Facts
Apostolic Learning Academy (Closed 2012)
(Pentecostal)
400 Louisa Avenue
Dupo, IL 62239
(618) 286-4279
Dupo, IL 62239
(618) 286-4279
Gr: K-12
Faith Baptist School (Closed 2025)
(Baptist)
413 E Main St
Belleville, IL 62220
(618) 234-3391
Belleville, IL 62220
(618) 234-3391
Gr: PK-12 | 48 students
116 E 1st St
East Saint Louis, IL 62206
(618) 337-2880
East Saint Louis, IL 62206
(618) 337-2880
Gr: K-9 | 104 students
Holy Rosary School (Closed 2015)
(Catholic)
2727 N 43rd Street
East Saint Louis, IL 62201
(618) 271-8600
East Saint Louis, IL 62201
(618) 271-8600
Gr: K-8 | 133 students
207 S Market St
New Athens, IL 62264
(618) 475-2170
New Athens, IL 62264
(618) 475-2170
Gr: PK-8 | 45 students
St. Mary Elementary School (Closed 2006)
(Catholic)
1722 West Main Street
Belleville, IL 62226
(618) 234-2476
Belleville, IL 62226
(618) 234-2476
Gr: PK-8 | 108 students
Frequently Asked Questions
What are the top-ranked private high schools in St. Clair County, IL?
The top-ranked private high schools in St. Clair County, IL include First Baptist Academy and Althoff Catholic High School.
How many private high schools are located in St. Clair County?
7 private high schools are located in St. Clair County.
How diverse are private high schools in St. Clair County?
St. Clair County private high schools are approximately 32% minority students, which is lower than the Illinois private school average of 35%.
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