#1 Best Private High Schools in Dupage County, IL
Ic Catholic Prep
Diocesan school · Grades 9–12
Smaller classes than 82% of Catholic schools in Illinois
Elmhurst, IL
A+Overall grade371 students9 students per teacher
2026 lists
Best Private High Schools in Dupage County, IL
Private high schools in Dupage County, IL with the highest overall grades. Top 6 of 6 schools.
#2 Best Private High Schools in Dupage County, IL
College Preparatory School of America
Islamic school · Grades Pre-K–12
99% of graduates go to four-year colleges
Lombard, IL
A+Overall grade602 students13 students per teacher
#3 Best Private High Schools in Dupage County, IL
St. Francis High School
Independent Catholic school · Grades 9–12
The only Catholic school in Wheaton
Wheaton, IL
AOverall grade703 students13 students per teacher
#4 Best Private High Schools in Dupage County, IL
Islamic Foundation School
Islamic school · Grades Pre-K–12
91% of graduates go to four-year colleges
Villa Park, IL
B+Overall grade633 students14 students per teacher
#5 Best Private High Schools in Dupage County, IL
Timothy Christian Schools
Christian school (nondenominational) · Grades Pre-K–12
The largest of 231 Christian schools in Illinois
Elmhurst, IL
B+Overall grade1,194 students18 students per teacher
#6 Best Private High Schools in Dupage County, IL
Marquette Manor Baptist Academy
Baptist school · Grades Pre-K–12
Serving families in Downers Grove since at least 2011
Downers Grove, IL
BOverall grade135 students13 students per teacher
Grades compare each school's official facts, such as class size, how long it has served families and where graduates go, with similar schools. They're a starting point: visit, ask questions and trust what you see.