#1 Most Diverse Private Schools in Oak Park, IL
The Field School
Christian school (nondenominational) · Grades Pre-K–8
Largest group: 34% of students
Oak Park, IL
BOverall grade227 students14 students per teacher
2026 lists
Most Diverse Private Schools in Oak Park, IL
Private schools in Oak Park, IL with the most varied mix of students. Top 7 of 7 schools.
#2 Most Diverse Private Schools in Oak Park, IL
Fenwick High School
Parish school · Grades 9–12
Largest group: 63% of students
Oak Park, IL
A+Overall grade1,024 students12 students per teacher
#3 Most Diverse Private Schools in Oak Park, IL
St. Giles School
Diocesan school · Grades Pre-K–8
Largest group: 64% of students
Oak Park, IL
AOverall grade264 students12 students per teacher
#4 Most Diverse Private Schools in Oak Park, IL
Alcuin Montessori School
Montessori school · Grades Pre-K–8
Largest group: 64% of students
Oak Park, IL
A+Overall grade90 students3 students per teacher
#5 Most Diverse Private Schools in Oak Park, IL
The Childrens School of Oak Park
Alternative school · Grades K–8
Largest group: 67% of students
Oak Park, IL
BOverall grade132 students11 students per teacher
#6 Most Diverse Private Schools in Oak Park, IL
Ascension Elementary School
Diocesan school · Grades Pre-K–8
Largest group: 70% of students
Oak Park, IL
AOverall grade322 students12 students per teacher
#7 Most Diverse Private Schools in Oak Park, IL
St. Catherine Siena-St. Lucy School
Diocesan school · Grades Pre-K–8
Largest group: 98% of students
Oak Park, IL
B-Overall grade175 students16 students per teacher
From official public records, updated October 2026.