#1 Largest Private Schools in Montana
St. Francis Catholic School
Diocesan school · Grades K–8
603 students
Billings, MT
B-Overall grade603 students13 students per teacher
2026 lists
Largest Private Schools in Montana
The private schools in Montana with the most students. Top 50 of 77 schools.
#2 Largest Private Schools in Montana
Billings Christian School
Christian school (nondenominational) · Grades Pre-K–12
443 students
Billings, MT
A+Overall grade443 students8 students per teacher
#3 Largest Private Schools in Montana
St. Labre Schools
Independent Catholic school · Grades Pre-K–12
422 students
Ashland, MT
BOverall grade422 students5 students per teacher
#4 Largest Private Schools in Montana
Stillwater Christian School
Christian school (nondenominational) · Grades Pre-K–12
380 students
Kalispell, MT
BOverall grade380 students11 students per teacher
#5 Largest Private Schools in Montana
Butte Central Elementary School
Diocesan school · Grades Pre-K–12
372 students
Butte, MT
B-Overall grade372 students13 students per teacher
#6 Largest Private Schools in Montana
Billings Central Catholic High School
Diocesan school · Grades 3–12
344 students
Billings, MT
A+Overall grade344 students5 students per teacher
#7 Largest Private Schools in Montana
Valley Christian School
Christian school (nondenominational) · Grades Pre-K–12
326 students
Missoula, MT
BOverall grade326 students11 students per teacher
#8 Largest Private Schools in Montana
Nelson Academy of Agricultural Sciences Online
Independent school · Grades 7–12
318 students
Scobey, MT
B-Overall grade318 students
#9 Largest Private Schools in Montana
Manhattan Christian School
Christian school (nondenominational) · Grades Pre-K–12
295 students
Manhattan, MT
B-Overall grade295 students11 students per teacher
#10 Largest Private Schools in Montana
St. Joseph School
Diocesan school · Grades Pre-K–8
283 students
Missoula, MT
B+Overall grade283 students12 students per teacher
#11 Largest Private Schools in Montana
Trinity Lutheran School
Lutheran (Missouri Synod) school · Grades Pre-K–8
219 students
Billings, MT
B-Overall grade219 students21 students per teacher
#12 Largest Private Schools in Montana
Trinity Lutheran School
Lutheran (Missouri Synod) school · Grades Pre-K–8
219 students
Kalispell, MT
B-Overall grade219 students15 students per teacher
#13 Largest Private Schools in Montana
Foothills Community Christian High School
Christian school (nondenominational) · Grades Pre-K–12
212 students
Great Falls, MT
B-Overall grade212 students12 students per teacher
#14 Largest Private Schools in Montana
Helena Christian School
Christian school (nondenominational) · Grades Pre-K–12
203 students
East Helena, MT
B-Overall grade203 students14 students per teacher
#15 Largest Private Schools in Montana
St. Andrew School
Independent Catholic school · Grades Pre-K–12
193 students
Helena, MT
A+Overall grade193 students6 students per teacher
#16 Largest Private Schools in Montana
St. Matthew's School
Parish school · Grades Pre-K–8
177 students
Kalispell, MT
AOverall grade177 students9 students per teacher
#17 Largest Private Schools in Montana
Our Lady of Lourdes Catholic School
Parish school · Grades Pre-K–8
173 students
Great Falls, MT
BOverall grade173 students14 students per teacher
#18 Largest Private Schools in Montana
Sacred Heart School
Parish school · Grades Pre-K–8
160 students
Miles City, MT
B-Overall grade160 students16 students per teacher
#19 Largest Private Schools in Montana
Sacred Heart Elementary School
Diocesan school · Grades Pre-K–8
159 students
Miles City, MT
B-Overall grade159 students17 students per teacher
#20 Largest Private Schools in Montana
Missoula International School
Independent school · Grades Pre-K–8
150 students
Missoula, MT
B+Overall grade150 students9 students per teacher
#21 Largest Private Schools in Montana
Loyola Sacred Heart High School
Diocesan school · Grades 9–12
143 students
Missoula, MT
A+Overall grade143 students9 students per teacher
#22 Largest Private Schools in Montana
Mission Valley Christian Academy
Christian school (nondenominational) · Grades Pre-K–12
138 students
Polson, MT
A+Overall grade138 students8 students per teacher
#23 Largest Private Schools in Montana
Brightways Global Academy
Alternative school · Grades Pre-K–12
134 students
Missoula, MT
B-Overall grade134 students
#24 Largest Private Schools in Montana
Sussex School
Independent school · Grades K–8
125 students
Missoula, MT
B+Overall grade125 students8 students per teacher
From official public records, updated October 2026.