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Average

#149 of 381 private schools in WA

Top 39% of private schools

St Monica School

Elementary School

4320 87TH AVE SE, Mercer Island, WA 98040

Private Estimated Score

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

Enrollment

216

Student-Teacher

12.1:1

Score

6.7

Grades

Pre-K – 8th

Updated 2021-22

How this school compares

In Mercer Island

#4 of 4

public schools

Washington elementary schools

#82 of 231

About St Monica School

ST MONICA SCHOOL serves 216 students from pre-kindergarten through eighth grade in Mercer Island, Washington. This elementary school maintains a favorable 12.1:1 student-teacher ratio with 18 full-time equivalent teachers, creating an environment where students can receive more individualized attention. The school earns a 7.2 out of 10 rating from MySchoolScout and ranks #243 out of 381 elementary schools statewide, placing it in the 36th percentile among Washington schools.

While there's room for academic growth, the school's small class sizes provide a strong foundation for student development and personalized learning opportunities. ST MONICA SCHOOL is situated in one of Washington's most affluent communities, where the median household income reaches $190,985 and median home values are $1,683,600. The surrounding neighborhood reflects a highly educated population, with 78% of residents holding bachelor's degrees or higher, and maintains a low poverty rate of just 5.3%.

This educated, prosperous community of 25,464 residents creates a supportive environment for learning. The school operates within Mercer Island's large suburban setting, benefiting from the community's commitment to education while serving families in this well-established, academically-minded area.

What Parents Should Know

As a private school, St Monica 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 Monica School compares to 5 public schools serving similar grades in Mercer Island, WA

Student-Teacher Ratio
12.1:1
This School
vs
17.9:1
Public Avg
Avg School Size
216
This School
vs
502
Public Avg
Avg School Scout Rating
6.7
This School
vs
8.4
Public Avg

Student Demographics

White 70.8% vs 0%
Asian 7.9% vs 0%
Hispanic 5.1% vs 0%
Black 2.3% vs 0%
St Monica School Mercer Island Public Avg

Nearby Elementary Schools

School Rating
St Monica School (this school) 6.7
Northwood Elementary School 9.1
West Mercer Elementary 8.8
Island Park Elementary 9.2
Islander Middle School 6.5
Lakeridge Elementary School 8.4

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 WA.

Classroom Attention
? Student-teacher ratio calibrated against other private schools. Lower ratios mean more individual attention. (30% of overall score)
B 5.5 / 10
View breakdown
Student-Teacher Ratio 12.1:1
Instructional Commitment
? Total annual instructional hours based on school day length and days per year. (15% of overall score)
A- 7.6 / 10
View breakdown
School Day Length 6.8 hours
Annual Instructional Hours 1,224
Diversity & Inclusion
? Racial and ethnic diversity of the student body using Simpson's diversity index. (20% of overall score)
B+ 6.7 / 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- 8.3 / 10
View breakdown
Enrollment 216
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 WA

Test Scores

Test score data not yet available for this school.

Student Demographics NCES PSS (SY 2021-22)

White 70.8%
Two or More 13.9%
Asian 7.9%
Hispanic 5.1%
Black 2.3%

Source: NCES Private School Survey (PSS)

Location

4320 87TH AVE SE, Mercer Island, WA 98040

Nearby Alternatives

Families considering St Monica School may also want to explore other elementary schools in the area. Island Park Elementary (rated 9.2/10, 1.1 miles away), which scores notably higher. Another option is Hazelwood Elementary School (rated 9.2/10, 2.8 miles away, in nearby Newcastle), which scores notably higher. Additionally, Northwood Elementary School (rated 9.1/10, 0.3 miles away), which scores notably higher. For more schools in Mercer Island, see our Mercer Island schools guide .

Nearby Schools

20 within 2.4 mi
School Distance Rating
Mercer Island High School Mercer Island 0.2 mi 7.2
Northwood Elementary School Mercer Island 0.3 mi 9.1
West Mercer Elementary Mercer Island 0.4 mi 8.8
NORTHWEST YESHIVA HIGH SCHOOL Mercer Island 0.8 mi 6.9
PRIVETT ACADEMY Mercer Island 0.8 mi
YELLOW WOOD ACADEMY Mercer Island 0.8 mi 8.2
Island Park Elementary Mercer Island 1.1 mi 9.2
FRENCH AMERICAN SCHOOL OF PUGET SOUND Mercer Island 0.9 mi 7.8
EARLY WORLD MONTESSORI Mercer Island 1.1 mi
CREATIVE LEARNING CENTER LLC Mercer Island 1.5 mi
Enatai Elementary School Bellevue 1.8 mi 6.8
Islander Middle School Mercer Island 2.2 mi 6.5
Lakeridge Elementary School Mercer Island 2.5 mi 8.4
Bellevue High School Bellevue 2.7 mi 7.5
Newport Heights Elementary Bellevue 2.2 mi 8.5
Vera Risdon Middle School Newcastle 2.6 mi 6.3
TORAH ACADEMY OF THE PACIFIC NORTHWEST Seattle 2.4 mi
Hazelwood Elementary School Newcastle 2.8 mi 9.2
Medina Elementary School Medina 3.3 mi 8.3
Newport Senior High School Bellevue 2.4 mi 8.0

Neighborhood Census ACS (2019-2023)

Census data for ZIP 98040 (ACS 2019-2023 5-Year Estimates) · Data sources

Median Income

$202,359

Median Home Value

$1,884,200

Median Rent

$2,464/mo

Population

25,282

College Educated

78.8%

Homeownership

66%

Avg Commute

24.9 min

Poverty Rate

4.6%

Median Age

45.8

Community Profile

The community surrounding St Monica School has a median household income of $202,359. It is a well-educated community where 79% of adults hold a bachelor's degree or higher. The median home value in the area is $1,884,200, with a median rent of $2,464/month. The local poverty rate of 4.6% is relatively low. The average commute for residents is 25 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
Jefferson Elementary Port Angeles, WA 6.7
ST NICHOLAS CATHOLIC SCHOOL Gig Harbor, WA 6.7
George Elementary Quincy, WA 6.8
IMMACULATE CONCEPTION / OLPH Everett, WA 6.8
ST BENEDICT SCHOOL Seattle, WA 6.8
Lincoln Elementary School Olympia, WA 6.6

Frequently Asked Questions

Common questions about St Monica School

What grades does St Monica School serve?

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

How many students attend St Monica School?

St Monica School has an enrollment of approximately 216 students.

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

The student-teacher ratio at St Monica School is 12.1:1. A lower ratio generally means more individual attention per student. The national average is approximately 11:1 for private schools.

How does St Monica School rank in WA?

St Monica School is ranked #149 out of 381 private schools in WA.

What is St Monica School's MySchoolScout rating?

St Monica School has a composite rating of 6.7 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 Monica School a private school?

Yes, St Monica 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 Monica School a religious school?

St Monica School has a Roman Catholic religious affiliation.

11 schools nearby View map →

Neighborhood Context

City Safety
Elevated (1,278/100K)

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

Quick Facts NCES PSS (SY 2021-22)

Grades
Pre-K – 8th
Enrollment
216
Gender Split
50% M / 50% F
Student-Teacher Ratio
12.1:1
Teachers (FTE)
18
Type
private
Coed Status
coed
Affiliation
Roman Catholic
School Day
6.8 hours
Days Per Year
180 days
Setting
Large Suburb
County
KING
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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