#1 Best Catholic Schools in Boise, ID
St. Marys School
Diocesan school · Grades Pre-K–8
Smaller classes than 92% of Catholic schools in Idaho
Boise, ID
A+Overall grade109 students6 students per teacher
2026 lists
Best Catholic Schools in Boise, ID
The highest-graded schools of this kind in Boise, ID. Top 5 of 5 schools.
#2 Best Catholic Schools in Boise, ID
St. Marks Elementary School
Parish school · Grades Pre-K–8
Serving families in Boise since at least 2011
Boise, ID
AOverall grade323 students14 students per teacher
#3 Best Catholic Schools in Boise, ID
St. Joseph's Catholic School
Diocesan school · Grades K–8
One of the 3 largest Catholic schools in Idaho
Boise, ID
B+Overall grade367 students15 students per teacher
#4 Best Catholic Schools in Boise, ID
Sacred Heart Catholic School
Diocesan school · Grades Pre-K–8
Growing: enrollment up 39% since 2011–12
Boise, ID
BOverall grade195 students15 students per teacher
#5 Best Catholic Schools in Boise, ID
Bishop Kelly High School
Diocesan school · Grades 9–12
The largest of 17 Catholic schools in Idaho
Boise, ID
BOverall grade967 students16 students per teacher
Grades compare each school's official facts, such as class size, how long it has served families and where graduates go, with similar schools. They're a starting point: visit, ask questions and trust what you see.