#1 Largest Private Schools in Lake County, IL
Lake Forest Academy
Independent school · Grades 9–12
446 students
Lake Forest, IL
A+Overall grade446 students7 students per teacher
2026 lists
Largest Private Schools in Lake County, IL
The private schools in Lake County, IL with the most students. Top 38 of 38 schools.
#2 Largest Private Schools in Lake County, IL
Cristo Rey St. Martin
Independent Catholic school · Grades 9–12
418 students
Waukegan, IL
B-Overall grade418 students18 students per teacher
#3 Largest Private Schools in Lake County, IL
St. Patrick School
Diocesan school · Grades Pre-K–8
389 students
Wadsworth, IL
BOverall grade389 students17 students per teacher
#4 Largest Private Schools in Lake County, IL
St. Joseph Catholic School
Parish school · Grades Pre-K–8
376 students
Libertyville, IL
BOverall grade376 students15 students per teacher
#5 Largest Private Schools in Lake County, IL
School of St. Mary
Diocesan school · Grades Pre-K–8
336 students
Lake Forest, IL
A+Overall grade336 students11 students per teacher
#6 Largest Private Schools in Lake County, IL
Lake Forest Country Day School
Independent school · Grades Pre-K–8
325 students
Lake Forest, IL
A+Overall grade325 students5 students per teacher
#7 Largest Private Schools in Lake County, IL
St. Gilbert Elementary School
Diocesan school · Grades Pre-K–8
320 students
Grayslake, IL
BOverall grade320 students16 students per teacher
#8 Largest Private Schools in Lake County, IL
St. Francis De Sales School
Diocesan school · Grades Pre-K–8
276 students
Lake Zurich, IL
AOverall grade276 students12 students per teacher
#9 Largest Private Schools in Lake County, IL
Westlake Christian Academy
Christian school (nondenominational) · Grades Pre-K–12
251 students
Grayslake, IL
BOverall grade251 students16 students per teacher
#10 Largest Private Schools in Lake County, IL
St. Anne Parish School
Diocesan school · Grades Pre-K–8
215 students
Barrington, IL
A-Overall grade215 students12 students per teacher
#11 Largest Private Schools in Lake County, IL
Frassati Catholic Academy
Diocesan school · Grades Pre-K–8
184 students
Wauconda, IL
A-Overall grade184 students12 students per teacher
#12 Largest Private Schools in Lake County, IL
St. Mary School
Parish school · Grades Pre-K–8
184 students
Buffalo Grove, IL
A-Overall grade184 students14 students per teacher
#13 Largest Private Schools in Lake County, IL
St. Anastasia Catholic School
Diocesan school · Grades Pre-K–8
178 students
Waukegan, IL
B+Overall grade178 students13 students per teacher
#14 Largest Private Schools in Lake County, IL
Most Blessed Trinity Academy
Independent Catholic school · Grades Pre-K–8
176 students
Waukegan, IL
B-Overall grade176 students18 students per teacher
#15 Largest Private Schools in Lake County, IL
St. Bede Elementary School
Diocesan school · Grades Pre-K–8
165 students
Ingleside, IL
AOverall grade165 students14 students per teacher
#16 Largest Private Schools in Lake County, IL
Menta Academy North
Special education school · Grades Pre-K–12
147 students
Waukegan, IL
BOverall grade147 students10 students per teacher
#17 Largest Private Schools in Lake County, IL
Lake County Christian Academy
Baptist school · Grades Pre-K–12
142 students
Waukegan, IL
A+Overall grade142 students10 students per teacher
#18 Largest Private Schools in Lake County, IL
Woodlands Academy of the Sacred Heart
Independent Catholic school · Grades 9–12
120 students
Lake Forest, IL
A+Overall gradeAll girls120 students5 students per teacher
#19 Largest Private Schools in Lake County, IL
Forest Bluff Montessori School
Montessori school · Grades Pre-K–8
116 students
Lake Bluff, IL
B-Overall grade116 students13 students per teacher
#20 Largest Private Schools in Lake County, IL
Allendale School
Special education school · Grades 2–12
110 students
Lake Villa, IL
AOverall grade110 students7 students per teacher
#21 Largest Private Schools in Lake County, IL
Da Vinci Waldorf School
Independent school · Grades Pre-K–8
94 students
Wauconda, IL
AOverall grade94 students6 students per teacher
#22 Largest Private Schools in Lake County, IL
Lions Math and Science Christian Academy
Baptist school · Grades K–8
82 students
Waukegan, IL
A-Overall grade82 students10 students per teacher
#23 Largest Private Schools in Lake County, IL
Gurnee Christian Academy
Seventh-day Adventist school · Grades Pre-K–12
74 students
Gurnee, IL
AOverall grade74 students11 students per teacher
#24 Largest Private Schools in Lake County, IL
Country Meadows Montessori School
Montessori school · Grades Pre-K–8
72 students
Gurnee, IL
AOverall grade72 students8 students per teacher
From official public records, updated October 2026.