#1 Most Diverse Private Schools in Saint Charles, MO
Duchesne High School
Diocesan school · Grades 9–12
Largest group: 74% of students
Saint Charles, MO
A+Overall grade225 students8 students per teacher
2026 lists
Most Diverse Private Schools in Saint Charles, MO
Private schools in Saint Charles, MO with the most varied mix of students. Top 9 of 9 schools.
#2 Most Diverse Private Schools in Saint Charles, MO
Seton Regional Catholic School
Parish school · Grades Pre-K–8
Largest group: 81% of students
Saint Charles, MO
BOverall grade248 students16 students per teacher
#3 Most Diverse Private Schools in Saint Charles, MO
Academy of the Sacred Heart
Independent Catholic school · Grades Pre-K–8
Largest group: 81% of students
Saint Charles, MO
A+Overall grade164 students10 students per teacher
#4 Most Diverse Private Schools in Saint Charles, MO
St. Cletus School
Parish school · Grades Pre-K–8
Largest group: 86% of students
Saint Charles, MO
A+Overall grade176 students10 students per teacher
#5 Most Diverse Private Schools in Saint Charles, MO
Sts. Joachim & Ann School
Parish school · Grades Pre-K–8
Largest group: 89% of students
Saint Charles, MO
BOverall grade155 students12 students per teacher
#6 Most Diverse Private Schools in Saint Charles, MO
Immanuel Lutheran School
Lutheran (Missouri Synod) school · Grades Pre-K–8
Largest group: 90% of students
Saint Charles, MO
B-Overall grade366 students13 students per teacher
#7 Most Diverse Private Schools in Saint Charles, MO
St. Joseph School
Parish school · Grades Pre-K–8
Largest group: 93% of students
Saint Charles, MO
B-Overall grade891 students20 students per teacher
#8 Most Diverse Private Schools in Saint Charles, MO
Zion Lutheran School
Lutheran (Missouri Synod) school · Grades Pre-K–8
Largest group: 97% of students
Saint Charles, MO
B-Overall grade364 students18 students per teacher
#9 Most Diverse Private Schools in Saint Charles, MO
St. John Paul II Preparatory
Independent Catholic school · Grades Pre-K–12
Largest group: 97% of students
Saint Charles, MO
B-Overall grade176 students7 students per teacher
From official public records, updated October 2026.