#1 Largest Private Schools in Belleville, IL
Althoff Catholic High School
Diocesan school · Grades 9–12
335 students
Belleville, IL
AOverall grade335 students15 students per teacher
2026 lists
Largest Private Schools in Belleville, IL
The private schools in Belleville, IL with the most students. Top 8 of 8 schools.
#2 Largest Private Schools in Belleville, IL
Zion Lutheran School
Lutheran (Missouri Synod) school · Grades Pre-K–8
256 students
Belleville, IL
BOverall grade256 students14 students per teacher
#3 Largest Private Schools in Belleville, IL
St. Teresa Catholic School
Diocesan school · Grades Pre-K–8
153 students
Belleville, IL
AOverall grade153 students11 students per teacher
#4 Largest Private Schools in Belleville, IL
Blessed Sacrament School
Parish school · Grades Pre-K–8
142 students
Belleville, IL
A+Overall grade142 students10 students per teacher
#5 Largest Private Schools in Belleville, IL
Our Lady Queen of Peace School
Parish school · Grades Pre-K–8
139 students
Belleville, IL
A+Overall grade139 students12 students per teacher
#6 Largest Private Schools in Belleville, IL
Governor French Academy
Independent school · Grades Pre-K–12
73 students
Belleville, IL
AOverall grade73 students7 students per teacher
#7 Largest Private Schools in Belleville, IL
Notre Dame Academy of Belleville
Parish school · Grades Pre-K–8
67 students
Belleville, IL
BOverall grade67 students
#8 Largest Private Schools in Belleville, IL
Asp2 STEAM Academy
Alternative school · Grades Pre-K–3
40 students
Belleville, IL
B+Overall grade40 students10 students per teacher
From official public records, updated October 2026.