#1 Largest Private Schools in Will County, IL
Providence Catholic High School
Diocesan school · Grades 9–12
754 students
New Lenox, IL
B-Overall grade754 students17 students per teacher
2026 lists
Largest Private Schools in Will County, IL
The private schools in Will County, IL with the most students. Top 30 of 30 schools.
#2 Largest Private Schools in Will County, IL
Joliet Catholic Academy
Independent Catholic school · Grades 9–12
598 students
Joliet, IL
BOverall grade598 students16 students per teacher
#3 Largest Private Schools in Will County, IL
St. Mary Elementary School
Diocesan school · Grades Pre-K–8
384 students
Mokena, IL
B-Overall grade384 students16 students per teacher
#4 Largest Private Schools in Will County, IL
Trinity Christian School
Christian school (nondenominational) · Grades Pre-K–8
304 students
Shorewood, IL
BOverall grade304 students15 students per teacher
#5 Largest Private Schools in Will County, IL
St. Mary Immaculate Parish School
Diocesan school · Grades Pre-K–8
303 students
Plainfield, IL
AOverall grade303 students13 students per teacher
#6 Largest Private Schools in Will County, IL
Cathedral of St. Raymond School
Parish school · Grades Pre-K–8
277 students
Joliet, IL
BOverall grade277 students16 students per teacher
#7 Largest Private Schools in Will County, IL
Families of Faith Christian Academy
Christian school (nondenominational) · Grades Pre-K–12
212 students
Channahon, IL
B+Overall grade212 students11 students per teacher
#8 Largest Private Schools in Will County, IL
Noonan Elementary Academy
Independent Catholic school · Grades Pre-K–8
191 students
Mokena, IL
A+Overall grade191 students5 students per teacher
#9 Largest Private Schools in Will County, IL
Furqaan Academy
Islamic school · Grades Pre-K–12
178 students
Bolingbrook, IL
A+Overall grade178 students6 students per teacher
#10 Largest Private Schools in Will County, IL
St. Jude Catholic School
Diocesan school · Grades Pre-K–8
171 students
Joliet, IL
BOverall grade171 students17 students per teacher
#11 Largest Private Schools in Will County, IL
St. Dennis and Joseph Catholic Academy
Diocesan school · Grades Pre-K–8
169 students
Lockport, IL
B+Overall grade169 students12 students per teacher
#12 Largest Private Schools in Will County, IL
St. Jude School
Diocesan school · Grades Pre-K–8
162 students
New Lenox, IL
B+Overall grade162 students13 students per teacher
#13 Largest Private Schools in Will County, IL
St. Paul the Apostle School
Diocesan school · Grades K–8
145 students
Joliet, IL
A+Overall grade145 students13 students per teacher
#14 Largest Private Schools in Will County, IL
St. Andrew the Apostle
Diocesan school · Grades Pre-K–8
144 students
Romeoville, IL
A+Overall grade144 students12 students per teacher
#15 Largest Private Schools in Will County, IL
St. Joseph Catholic Elementary School
Diocesan school · Grades Pre-K–8
142 students
Manhattan, IL
A+Overall grade142 students9 students per teacher
#16 Largest Private Schools in Will County, IL
St. Mary Nativity School
Parish school · Grades Pre-K–8
139 students
Joliet, IL
B+Overall grade139 students17 students per teacher
#17 Largest Private Schools in Will County, IL
Illinois Lutheran High School and Junior High
Lutheran (Wisconsin Synod) school · Grades 7–12
135 students
Crete, IL
B+Overall grade135 students10 students per teacher
#18 Largest Private Schools in Will County, IL
Illinois Lutheran Elementary School
Lutheran (Wisconsin Synod) school · Grades Pre-K–6
125 students
Crete, IL
BOverall grade125 students18 students per teacher
#19 Largest Private Schools in Will County, IL
Mother Teresa Catholic Academy
Parish school · Grades Pre-K–8
117 students
Crete, IL
A+Overall grade117 students11 students per teacher
#20 Largest Private Schools in Will County, IL
Montessori School of Lemont
Montessori school · Grades Pre-K–9
95 students
Lemont, IL
A-Overall grade95 students11 students per teacher
#21 Largest Private Schools in Will County, IL
Bobbie Noonan's Child Care
Early childhood program · Grades Pre-K–K
70 students
Homer Glen, IL
BOverall grade70 students
#22 Largest Private Schools in Will County, IL
Lupine Montessori School
Montessori school · Grades Pre-K–9
65 students
Lockport, IL
BOverall grade65 students13 students per teacher
#23 Largest Private Schools in Will County, IL
Joliet Montessori School
Montessori school · Grades Pre-K–6
47 students
Crest Hill, IL
B+Overall grade47 students10 students per teacher
#24 Largest Private Schools in Will County, IL
LT Joseph P Kennedy Jr. School
Special education school · Grades 1–12
39 students
Tinley Park, IL
A-Overall grade39 students4 students per teacher
From official public records, updated October 2026.