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 Althoff Catholic High School and First Baptist Academy.
The average acceptance rate is 73%, which is lower than the Illinois private high school average acceptance rate of 81%.
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 Althoff Catholic High School and First Baptist Academy.
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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