#1 Best Private 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 Schools in Dupage County, IL
Private schools in Dupage County, IL with the highest overall grades. Top 45 of 45 schools.
#2 Best Private Schools in Dupage County, IL
Naperville Christian Academy
Christian school (nondenominational) · Grades Pre-K–12
The smallest classes of any Christian school in Naperville
Naperville, IL
A+Overall grade126 students6 students per teacher
#3 Best Private Schools in Dupage County, IL
St. Matthew School
Diocesan school · Grades Pre-K–8
Smaller classes than 91% of Catholic schools in Illinois
Glendale Heights, IL
A+Overall grade75 students8 students per teacher
#4 Best Private Schools in Dupage County, IL
St. Walter School
Parish school · Grades Pre-K–8
Smaller classes than 91% of Catholic schools in Illinois
Roselle, IL
A+Overall grade341 students8 students per teacher
#5 Best Private Schools in Dupage County, IL
Holy Trinity School
Parish school · Grades Pre-K–8
Smaller classes than 80% of Catholic schools in Illinois
Westmont, IL
A+Overall grade117 students9 students per teacher
#6 Best Private Schools in Dupage County, IL
The Waldorf School of Dupage
Independent school · Grades Pre-K–8
The only independent school in Warrenville
Warrenville, IL
A+Overall grade76 students5 students per teacher
#7 Best Private Schools in Dupage County, IL
Kingswood Academy
Independent Catholic school · Grades Pre-K–8
Smaller classes than 78% of Catholic schools in Illinois
Darien, IL
A+Overall grade127 students10 students per teacher
#8 Best Private Schools in Dupage County, IL
Notre Dame School
Diocesan school · Grades Pre-K–8
Smaller classes than 72% of Catholic schools in Illinois
Clarendon Hills, IL
A+Overall grade158 students10 students per teacher
#9 Best Private 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
#10 Best Private Schools in Dupage County, IL
Calvary Christian School
Christian school (nondenominational) · Grades Pre-K–8
The largest Christian school in Naperville
Naperville, IL
AOverall grade257 students10 students per teacher
#11 Best Private Schools in Dupage County, IL
Avery Coonley School
Independent school · Grades Pre-K–8
The only independent school in Downers Grove
Downers Grove, IL
AOverall grade290 students7 students per teacher
#12 Best Private Schools in Dupage County, IL
Clapham School
Christian school (nondenominational) · Grades Pre-K–12
The only Christian school in Wheaton
Wheaton, IL
AOverall grade145 students6 students per teacher
#13 Best Private Schools in Dupage County, IL
Icn Noor Academy
Islamic school · Grades Pre-K–5
Serving families in Naperville since at least 2011
Naperville, IL
AOverall grade112 students11 students per teacher
#14 Best Private 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
#15 Best Private Schools in Dupage County, IL
All Saints Catholic Academy
Parish school · Grades Pre-K–8
Serving families in Naperville since at least 2011
Naperville, IL
A-Overall grade414 students14 students per teacher
#16 Best Private Schools in Dupage County, IL
St. Raphael Catholic School
Diocesan school · Grades Pre-K–8
The smallest classes of any Catholic school in Naperville
Naperville, IL
A-Overall grade247 students13 students per teacher
#17 Best Private 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
#18 Best Private Schools in Dupage County, IL
Covenant Classical School
Christian school (nondenominational) · Grades K–8
One of 4 Christian schools in Naperville
Naperville, IL
B+Overall grade109 students10 students per teacher
#19 Best Private Schools in Dupage County, IL
St. Alphonsus/St Patrick School
Diocesan school · Grades Pre-K–8
Smaller classes than 62% of Catholic schools in Illinois
Lemont, IL
B+Overall grade153 students11 students per teacher
#20 Best Private Schools in Dupage County, IL
Carriers of Light
Islamic school · Grades Pre-K–6
A private school in Wheaton
Wheaton, IL
B+Overall grade108 students11 students per teacher
#21 Best Private Schools in Dupage County, IL
St. Isidore School
Diocesan school · Grades Pre-K–8
The only Catholic school in Bloomingdale
Bloomingdale, IL
B+Overall grade189 students14 students per teacher
#22 Best Private Schools in Dupage County, IL
St. James the Apostle School
Parish school · Grades Pre-K–8
Serving families in Glen Ellyn since at least 2011
Glen Ellyn, IL
B+Overall grade163 students13 students per teacher
#23 Best Private Schools in Dupage County, IL
St. Pius X Elementary School
Parish school · Grades Pre-K–8
The only Catholic school in Lombard
Lombard, IL
B+Overall grade300 students14 students per teacher
#24 Best Private Schools in Dupage County, IL
Immanuel Lutheran
Lutheran (Missouri Synod) school · Grades Pre-K–8
Serving families in Elmhurst since at least 2011
Elmhurst, IL
B+Overall grade75 students10 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.