#1 Largest Private Schools in Billings, MT
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 Billings, MT
The private schools in Billings, MT with the most students. Top 10 of 10 schools.
#2 Largest Private Schools in Billings, MT
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 Billings, MT
Billings Central Catholic High School
Diocesan school · Grades 3–12
344 students
Billings, MT
A+Overall grade344 students5 students per teacher
#4 Largest Private Schools in Billings, MT
Trinity Lutheran School
Lutheran (Missouri Synod) school · Grades Pre-K–8
219 students
Billings, MT
B-Overall grade219 students21 students per teacher
#5 Largest Private Schools in Billings, MT
Grace Montessori Academy
Christian (nondenominational) · Montessori · Grades Pre-K–8
91 students
Billings, MT
BOverall grade91 students9 students per teacher
#6 Largest Private Schools in Billings, MT
Yellowstone Academy
Special education school · Grades 6–12
75 students
Billings, MT
AOverall grade75 students5 students per teacher
#7 Largest Private Schools in Billings, MT
New Day
Independent school · Grades 5–12
57 students
Billings, MT
B+Overall grade57 students29 students per teacher
#8 Largest Private Schools in Billings, MT
Sunrise Montessori School
Montessori school · Grades Pre-K–6
51 students
Billings, MT
AOverall grade51 students4 students per teacher
#9 Largest Private Schools in Billings, MT
New Day School
Alternative school · Grades 6–12
42 students
Billings, MT
B+Overall grade42 students21 students per teacher
#10 Largest Private Schools in Billings, MT
Mt. Olive Lutheran School
Lutheran (Missouri Synod) school · Grades Pre-K–7
27 students
Billings, MT
AOverall grade27 students7 students per teacher
From official public records, updated October 2026.