#1 Best Private Schools in Cook County, IL
Trinity High School
Independent Catholic school · Grades 9–12
100% of graduates go to four-year colleges
Chicago, IL
A+Overall gradeAll girls316 students11 students per teacher
2026 lists
Best Private Schools in Cook County, IL
Private schools in Cook County, IL with the highest overall grades. Top 50 of 256 schools.
#2 Best Private Schools in Cook County, IL
Gems World Academy Chicago
Independent school · Grades Pre-K–12
Smaller classes than 82% of independent schools in Illinois
Chicago, IL
A+Overall grade196 students3 students per teacher
#3 Best Private Schools in Cook County, IL
North Shore Country Day School
Independent school · Grades Pre-K–12
The only independent school in Winnetka
Winnetka, IL
A+Overall grade510 students6 students per teacher
#4 Best Private Schools in Cook County, IL
Roycemore School
Independent school · Grades Pre-K–12
The largest independent school in Evanston
Evanston, IL
A+Overall grade224 students5 students per teacher
#5 Best Private Schools in Cook County, IL
Frances Xavier Warde School
Independent Catholic school · Grades Pre-K–8
Smaller classes than 93% of Catholic schools in Illinois
Chicago, IL
A+Overall grade745 students6 students per teacher
#6 Best Private Schools in Cook County, IL
Daystar Academy
Christian school (nondenominational) · Grades Pre-K–12
One of the most diverse private schools in Illinois
Chicago, IL
A+Overall grade271 students7 students per teacher
#7 Best Private Schools in Cook County, IL
Regina Dominican HS
Independent Catholic school · Grades 9–12
The only all-girls school in Wilmette
Wilmette, IL
A+Overall gradeAll girls200 students8 students per teacher
#8 Best Private Schools in Cook County, IL
The Latin School of Chicago
Independent school · Grades K–4
Smaller classes than 84% of independent schools in Illinois
Chicago, IL
A+Overall grade371 students5 students per teacher
#9 Best Private Schools in Cook County, IL
Mount Carmel High School
Independent Catholic school · Grades 9–12
94% of graduates go to four-year colleges
Chicago, IL
A+Overall gradeAll boys588 students11 students per teacher
#10 Best Private Schools in Cook County, IL
Northside Catholic Academy
Parish school · Grades Pre-K–8
Smaller classes than 75% of Catholic schools in Illinois
Chicago, IL
A+Overall grade267 students10 students per teacher
#11 Best Private Schools in Cook County, IL
Old St. Marys School
Parish school · Grades K–8
Smaller classes than 88% of Catholic schools in Illinois
Chicago, IL
A+Overall grade419 students8 students per teacher
#12 Best Private Schools in Cook County, IL
St. George School
Parish school · Grades Pre-K–8
The only Catholic school in Tinley Park
Tinley Park, IL
A+Overall grade128 students9 students per teacher
#13 Best Private Schools in Cook County, IL
Intercultural Montessori Language School
Montessori school · Grades Pre-K–8
Smaller classes than 67% of Montessori schools in Illinois
Chicago, IL
A+Overall grade133 students4 students per teacher
#14 Best Private Schools in Cook County, IL
St. Norbert School
Parish school · Grades Pre-K–8
The only Catholic school in Northbrook
Northbrook, IL
A+Overall grade123 students8 students per teacher
#15 Best Private Schools in Cook County, IL
Frances Xavier Warde School
Independent Catholic school · Grades 4–8
Smaller classes than 80% of Catholic schools in Illinois
Chicago, IL
A+Overall grade426 students9 students per teacher
#16 Best Private Schools in Cook County, IL
St. Constance School
Parish school · Grades Pre-K–8
Smaller classes than 76% of Catholic schools in Illinois
Chicago, IL
A+Overall grade116 students10 students per teacher
#17 Best Private Schools in Cook County, IL
Josephinum Academy of the Sacred Heart
Independent Catholic school · Grades 9–12
Smaller classes than 98% of Catholic schools in Illinois
Chicago, IL
A+Overall gradeAll girls90 students5 students per teacher
#18 Best Private Schools in Cook County, IL
Fenwick High School
Parish school · Grades 9–12
The largest Catholic school in Oak Park
Oak Park, IL
A+Overall grade1,024 students12 students per teacher
#19 Best Private Schools in Cook County, IL
Depaul College Prep
Independent Catholic school · Grades 9–12
One of the 3 largest Catholic schools in Illinois
Chicago, IL
A+Overall grade1,245 students11 students per teacher
#20 Best Private Schools in Cook County, IL
Lycee Francais De Chicago
Independent school · Grades Pre-K–12
98% of graduates go to four-year colleges
Chicago, IL
A+Overall grade687 students6 students per teacher
#21 Best Private Schools in Cook County, IL
St. Edward School
Parish school · Grades Pre-K–8
Smaller classes than 62% of Catholic schools in Illinois
Chicago, IL
A+Overall grade232 students11 students per teacher
#22 Best Private Schools in Cook County, IL
St. Hilary School
Diocesan school · Grades Pre-K–8
Smaller classes than 81% of Catholic schools in Illinois
Chicago, IL
A+Overall grade109 students9 students per teacher
#23 Best Private Schools in Cook County, IL
Everest Academy
Independent Catholic school · Grades Pre-K–8
Smaller classes than 93% of Catholic schools in Illinois
Lemont, IL
A+Overall grade164 students7 students per teacher
#24 Best Private Schools in Cook County, IL
St. Germaine School
Parish school · Grades Pre-K–8
The smallest classes of any Catholic school in Oak Lawn
Oak Lawn, IL
A+Overall grade173 students12 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.