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Excellent

#2 of 82 private schools in ID

Top 1% of private schools

St Marys School

Elementary School

2620 W STATE ST, Boise, ID 83702

Private Estimated Score

Estimated academic score. This school does not have standardized test data. Based on ID statewide data. Learn more

Enrollment

141

Student-Teacher

8.6:1

Score

8.3

Grades

Pre-K – 8th

Updated 2021-22

How this school compares

In Boise

#2 of 15

public schools

Idaho elementary schools

#1 of 48

About St Marys School

ST MARYS SCHOOL stands out as Idaho's top-ranked elementary school, earning a 9.0 out of 10 MySchoolScout rating and holding the #1 position among the state's 82 elementary schools. This public school serves 141 students from pre-kindergarten through eighth grade with an exceptionally low student-teacher ratio of 8.6 to 1, supported by 16 full-time equivalent teachers. The school's outstanding performance reflects the strong educational environment fostered by both dedicated staff and an engaged community.

Students benefit from small class sizes that allow for individualized attention and meaningful teacher-student relationships throughout their elementary and middle school years. ST MARYS SCHOOL draws families from a well-established neighborhood where 61% of residents hold bachelor's degrees or higher, creating a community that values education. The area's median household income of $77,115 and relatively low poverty rate of 9.6% contribute to a stable learning environment where students can focus on their academic development.

Located on West State Street in Boise, the school serves families in a thriving mid-size city that balances urban amenities with a strong sense of community, providing students with both educational excellence and a supportive neighborhood environment.

What Parents Should Know

With an enrollment of 141 students, St Marys School is a smaller school where families often find a close-knit community atmosphere. Smaller settings can mean more individual attention from teachers and staff, though they may offer fewer extracurricular options than larger schools.

With a student-teacher ratio of 8.6:1, St Marys School offers a notably low ratio compared to the national average. This typically means smaller class sizes and more opportunities for one-on-one interaction between students and teachers.

As a private school, St Marys School operates independently from the local public school district. Families considering this school should inquire about tuition costs, financial aid availability, and the admissions process. Private schools are not required to follow the same curriculum standards as public schools, which can be either an advantage or a consideration depending on your priorities.

Compare to Public Schools

Beta

How St Marys School compares to 69 public schools serving similar grades in Boise, ID

Student-Teacher Ratio
8.6:1
This School
vs
16.4:1
Public Avg
Avg School Size
141
This School
vs
399
Public Avg
Avg School Scout Rating
8.3
This School
vs
6.8
Public Avg

Student Demographics

White 67.4% vs 0%
Hispanic 24.1% vs 0%
Asian 2.1% vs 0%
Black 1.4% vs 0%
St Marys School Boise Public Avg

Nearby Elementary Schools

School Rating
St Marys School (this school) 8.3
LOWELL ELEMENTARY SCHOOL 8.6
MADISON EARLY CHILDHOOD SCHOOL 7.7
WHITTIER ELEMENTARY SCHOOL 6.6
WASHINGTON ELEMENTARY SCHOOL 9.1
TAFT ELEMENTARY SCHOOL 5.7
NORTH JUNIOR HIGH SCHOOL 8.3
LONGFELLOW ELEMENTARY SCHOOL 6.2
MINIDOKA JUNIOR HIGH ALTERNATIVE 7.6
TIGER LEARN PROGRAM
KOELSCH ELEMENTARY SCHOOL 5.1
HILLSIDE JUNIOR HIGH SCHOOL 6.1
HIGHLANDS ELEMENTARY SCHOOL 8.0
COLLISTER ELEMENTARY SCHOOL 6.2
JEFFERSON ELEMENTARY SCHOOL 5.8
ADA COUNTY JUVENILE CENTER
MOUNTAIN VIEW ELEMENTARY SCHOOL 7.8
MONROE ELEMENTARY SCHOOL 5.5
SOUTH JUNIOR HIGH SCHOOL 7.0
ROOSEVELT ELEMENTARY SCHOOL 7.4
FAIRMONT JUNIOR HIGH SCHOOL 5.1

Showing 20 of 69 schools. View all schools in Boise

Demographics sourced from NCES Private School Survey (PSS) and Common Core of Data (CCD). Comparisons are based on enrollment-weighted averages.

Score Breakdown

What This Rating Measures

This rating reflects classroom size, instructional time, student diversity, community resources, and school characteristics. Private schools are ranked against other private schools in ID.

Classroom Attention
? Student-teacher ratio calibrated against other private schools. Lower ratios mean more individual attention. (30% of overall score)
A- 7.6 / 10
View breakdown
Student-Teacher Ratio 8.6:1
Instructional Commitment
? Total annual instructional hours based on school day length and days per year. (15% of overall score)
A- 8.2 / 10
View breakdown
School Day Length 7.2 hours
Annual Instructional Hours 1,252.8
Diversity & Inclusion
? Racial and ethnic diversity of the student body using Simpson's diversity index. (20% of overall score)
A 9.1 / 10
View breakdown
Diversity Index 47%
Community Context

Data Unavailable

School Profile
? Enrollment size and grade span breadth — indicators of program depth and peer community. (15% of overall score)
A 8.6 / 10
View breakdown
Enrollment 141
View data sources

Score basis: Private school model

Data coverage: 80% of scoring components had data

Components scored: 4 of 5

Ranking pool: Private schools in ID

Test Scores

Test score data not yet available for this school.

Student Demographics NCES PSS (SY 2021-22)

White 67.4%
Hispanic 24.1%
Asian 2.1%
Two or More 2.1%
Black 1.4%
Native American 1.4%
Pacific Islander 1.4%

Source: NCES Private School Survey (PSS)

Location

2620 W STATE ST, Boise, ID 83702

Nearby Alternatives

Families considering St Marys School may also want to explore other elementary schools in the area. WASHINGTON ELEMENTARY SCHOOL (rated 9.1/10, 0.8 miles away), which scores slightly higher. Another option is LOWELL ELEMENTARY SCHOOL (rated 8.6/10, 0.2 miles away), with a very similar rating. Additionally, ANSER CHARTER SCHOOL (rated 8.5/10, 1.4 miles away, in nearby Garden City), with a very similar rating. For more schools in Boise, see our Boise schools guide .

Nearby Schools

20 within 1.9 mi
School Distance Rating
LOWELL ELEMENTARY SCHOOL Boise 0.2 mi 8.6
MADISON EARLY CHILDHOOD SCHOOL Boise 0.5 mi 7.7
WHITTIER ELEMENTARY SCHOOL Boise 0.6 mi 6.6
LEARNING TREE INC Boise 1.0 mi
WASHINGTON ELEMENTARY SCHOOL Boise 0.8 mi 9.1
TAFT ELEMENTARY SCHOOL Boise 0.9 mi 5.7
NORTH JUNIOR HIGH SCHOOL Boise 1.0 mi 8.3
ONE STONE Boise 1.3 mi 7.7
WESLEYAN PRESCHOOL & KINDERGARTEN Boise 1.2 mi
BOISE SENIOR HIGH SCHOOL Boise 1.2 mi 7.9
LONGFELLOW ELEMENTARY SCHOOL Boise 1.2 mi 6.2
FUTURE PUBLIC SCHOOL Garden City 1.2 mi 8.2
THE CHILDREN'S SCHOOL OF BOISE Boise 1.3 mi
ST JOSEPH'S CATHOLIC SCHOOL Boise 1.4 mi 6.2
HILLSIDE JUNIOR HIGH SCHOOL Boise 1.8 mi 6.1
MINIDOKA JUNIOR HIGH ALTERNATIVE Boise 1.5 mi 7.6
TIGER LEARN PROGRAM Boise 1.5 mi
ANSER CHARTER SCHOOL Garden City 1.4 mi 8.5
LOGAN CHRISTIAN ACADEMY Boise 1.8 mi
HILLSIDE ACADEMY Boise 1.9 mi

Neighborhood Census ACS (2019-2023)

Census data for ZIP 83702 (ACS 2019-2023 5-Year Estimates) · Data sources

Median Income

$82,586

Median Home Value

$708,000

Median Rent

$1,175/mo

Population

23,981

College Educated

60.9%

Homeownership

51.4%

Avg Commute

17.1 min

Poverty Rate

10.1%

Median Age

41

Community Profile

The community surrounding St Marys School has a median household income of $82,586. It is a well-educated community where 61% of adults hold a bachelor's degree or higher. The median home value in the area is $708,000, with a median rent of $1,175/month. The area has a poverty rate of 10.1%. Residents enjoy a short average commute of 17 minutes. Source: U.S. Census ACS 2022 5-Year Estimates.

Similar Schools

Schools in the same state with comparable level, size, and ratings

School Rating
IDAHO HILL ELEMENTARY SCHOOL Oldtown, ID 8.3
ROBERTS ELEMENTARY SCHOOL Roberts, ID 8.2
CHALLIS ELEMENTARY SCHOOL Challis, ID 8.5
HOPE ELEMENTARY SCHOOL Hope, ID 8.5
JULIAETTA ELEMENTARY SCHOOL Juliaetta, ID 8.5
KAMIAH ELEMENTARY SCHOOL Kamiah, ID 8.5

Frequently Asked Questions

Common questions about St Marys School

What grades does St Marys School serve?

St Marys School serves students in grades Pre-K through 8th.

How many students attend St Marys School?

St Marys School has an enrollment of approximately 141 students.

What is the student-teacher ratio at St Marys School?

The student-teacher ratio at St Marys School is 8.6:1. A lower ratio generally means more individual attention per student. The national average is approximately 11:1 for private schools.

How does St Marys School rank in ID?

St Marys School is ranked #2 out of 82 private schools in ID.

What is St Marys School's MySchoolScout rating?

St Marys School has a composite rating of 8.3 out of 10 on MySchoolScout. This score combines academic performance, student growth, and school environment into a single score. Equity data is shown separately for context.

Is St Marys School a private school?

Yes, St Marys School is a private coeducational school with a Roman Catholic affiliation. Private schools are not required to participate in state standardized testing, so academic performance data may be limited compared to public schools.

Is St Marys School a religious school?

St Marys School has a Roman Catholic religious affiliation.

11 schools nearby View map →

Neighborhood Context

Walk Score
65 Somewhat Walkable
Transit Score
32 Some Transit
Bike Score
86 Very Bikeable
City Safety
Elevated (1,416/100K)

Powered by Walk Score

FBI UCR 2024. City-level (Boise). Data >1 year old.

Quick Facts NCES PSS (SY 2021-22)

Grades
Pre-K – 8th
Enrollment
141
Gender Split
65% M / 35% F
Student-Teacher Ratio
8.6:1
Teachers (FTE)
16
Type
private
Coed Status
coed
Affiliation
Roman Catholic
School Day
7.2 hours
Days Per Year
174 days
Setting
Midsize City
County
ADA
Data Year
2022–2023

How We Rate Schools

Every school receives a composite score from 1 to 10 based on four pillars: Academic Performance (50%), Student Growth (20%), Equity (15%), and Learning Environment (15%). Scores are built from publicly available data including standardized test results, enrollment figures, and school climate indicators.

Read our full methodology

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