#1 Best Catholic Schools in the Diocese of Boise
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 the Diocese of Boise
The highest-graded schools of this kind in the Diocese of Boise. Top 14 of 14 schools.
#2 Best Catholic Schools in the Diocese of Boise
Holy Rosary Catholic School
Parish school · Grades Pre-K–5
The only Catholic school in Idaho Falls
Idaho Falls, ID
A+Overall grade79 students12 students per teacher
#3 Best Catholic Schools in the Diocese of Boise
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
#4 Best Catholic Schools in the Diocese of Boise
St. Mary's Parish School
Parish school · Grades Pre-K–8
The only Catholic school in Moscow
Moscow, ID
AOverall grade84 students9 students per teacher
#5 Best Catholic Schools in the Diocese of Boise
Holy Family Catholic School
Diocesan school · Grades Pre-K–8
The only Catholic school in Coeur d'Alene
Coeur d'Alene, ID
AOverall grade241 students14 students per teacher
#6 Best Catholic Schools in the Diocese of Boise
Sts. Peter & Paul School
Parish school · Grades Pre-K–8
Smaller classes than 62% of Catholic schools in Idaho
Grangeville, ID
A-Overall grade63 students13 students per teacher
#7 Best Catholic Schools in the Diocese of Boise
St. Nicholas Catholic School
Diocesan school · Grades Pre-K–6
Growing: enrollment up 82% since 2011–12
Rupert, ID
B+Overall grade118 students17 students per teacher
#8 Best Catholic Schools in the Diocese of Boise
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
#9 Best Catholic Schools in the Diocese of Boise
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
#10 Best Catholic Schools in the Diocese of Boise
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
#11 Best Catholic Schools in the Diocese of Boise
St. Edwards Catholic School
Diocesan school · Grades Pre-K–8
The only Catholic school in Twin Falls
Twin Falls, ID
BOverall grade157 students
#12 Best Catholic Schools in the Diocese of Boise
Immaculate Conception Academy
Independent Catholic school · Grades K–12
The only Catholic school in Post Falls
Post Falls, ID
BOverall gradeAll boys188 students10 students per teacher
#13 Best Catholic Schools in the Diocese of Boise
All Saints Catholic School
Diocesan school · Grades Pre-K–8
The only Catholic school in Lewiston
Lewiston, ID
B-Overall grade216 students18 students per teacher
#14 Best Catholic Schools in the Diocese of Boise
St. Ignatius Catholic School
Diocesan school · Grades Pre-K–8
The only Catholic school in Meridian
Meridian, ID
B-Overall grade428 students18 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.