#1 Largest Private Schools in Idaho Falls, ID
Watersprings School
Christian school (nondenominational) · Grades Pre-K–12
364 students
Idaho Falls, ID
A-Overall grade364 students12 students per teacher
2026 lists
Largest Private Schools in Idaho Falls, ID
The private schools in Idaho Falls, ID with the most students. Top 6 of 6 schools.
#2 Largest Private Schools in Idaho Falls, ID
Watersprings School
Christian school (nondenominational) · Grades Pre-K–12
363 students
Idaho Falls, ID
BOverall grade363 students12 students per teacher
#3 Largest Private Schools in Idaho Falls, ID
Holy Rosary Catholic School
Parish school · Grades Pre-K–5
79 students
Idaho Falls, ID
A+Overall grade79 students12 students per teacher
#4 Largest Private Schools in Idaho Falls, ID
Hope Lutheran School
Lutheran (Missouri Synod) school · Grades Pre-K–7
45 students
Idaho Falls, ID
AOverall grade45 students7 students per teacher
#5 Largest Private Schools in Idaho Falls, ID
Lighthouse Montessori School
Montessori school · Grades Pre-K–3
35 students
Idaho Falls, ID
B+Overall grade35 students10 students per teacher
#6 Largest Private Schools in Idaho Falls, ID
Little Peoples Academy
Early childhood program · Grades Pre-K–K
24 students
Idaho Falls, ID
B+Overall grade24 students24 students per teacher
From official public records, updated October 2026.