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Very Good

#397 of 1,790 private schools in CA

Top 22% of private schools

Stanbridge Academy

School

515 E POPLAR AVE, San Mateo, CA 94401

Private Estimated Score

Estimated academic score. This school does not have standardized test data. Based on 19 schools in San Mateo. Learn more

Enrollment

91

Student-Teacher

3.8:1

Score

7.2

Grades

Kindergarten – 12th

Updated 2021-22

How this school compares

In San Mateo

#7 of 12

public schools

California schools

#87 of 366

About Stanbridge Academy

Stanbridge Academy serves 91 students in grades kindergarten through 12th in San Mateo, California. This regular public school stands out with an exceptional student-teacher ratio of 3.8:1, supported by 24 full-time equivalent teachers, creating an intimate learning environment where students receive significant individual attention. The school earns a strong MySchoolScout rating of 9.0 out of 10 and ranks #775 out of 1790 schools statewide, placing it in the 57th percentile among California schools.

This solid performance reflects the school's commitment to providing quality education in a small school setting that spans all grade levels from elementary through high school. Stanbridge Academy's unique structure as a K-12 school allows students to build lasting relationships with teachers and peers while maintaining continuity in their educational journey. The remarkably low student-teacher ratio suggests a highly personalized approach to learning, with ample opportunity for individualized instruction and support.

The school is situated in San Mateo's 94401 neighborhood, an affluent community where the median household income reaches $117,678 and nearly half of residents hold bachelor's degrees or higher. This educated, economically stable community provides a supportive environment for learning, with the school serving families in a mid-size city setting that balances suburban comfort with urban accessibility.

What Parents Should Know

With an enrollment of 91 students, Stanbridge Academy 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 3.8:1, Stanbridge Academy 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, Stanbridge Academy 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.

Financial Overview

Source: IRS Form 990 (2023 filing)

Per-Pupil Spending
Total expenses ÷ enrollment
$51,462
Per-Pupil Revenue
Total revenue ÷ enrollment
$61,649
Financial Health
Revenue-to-expense ratio (>1.0 = surplus)
1.20x — Strong
Tuition Dependency
Share of revenue from program services (tuition, fees)
80%
Total Assets
End-of-year total assets from IRS filing
$8.5M

Financial data from IRS Form 990 filings via ProPublica Nonprofit Explorer. Per-pupil figures based on current enrollment of 91 students. Not all private schools file Form 990.

Compare to Public Schools

Beta

How Stanbridge Academy compares to 20 public schools serving similar grades in San Mateo, CA

Student-Teacher Ratio
3.8:1
This School
vs
19.5:1
Public Avg
Avg School Size
91
This School
vs
603
Public Avg
Avg School Scout Rating
7.2
This School
vs
6.5
Public Avg

Student Demographics

White 63.7% vs 0%
Asian 24.2% vs 0%
Hispanic 5.5% vs 0%
Black 3.3% vs 0%
Stanbridge Academy San Mateo Public Avg

Nearby Other Schools

School Rating
Stanbridge Academy (this school) 7.2
San Mateo High 7.7
College Park Elementary 7.0
North Shoreview Montessori 9.1
San Mateo Park Elementary 3.4
Sunnybrae Elementary 5.0
Baywood Elementary 5.1
LEAD Elementary 5.6
Aragon High 8.5
Borel Middle 5.6
Bayside Academy 6.1
Parkside Montessori 8.9
Fiesta Gardens International Elementary 6.6
Meadow Heights Elementary 5.2
Beresford Elementary 6.7
Hillsdale High 7.0
Abbott Middle 6.9
Laurel Elementary 3.6
George Hall Elementary 9.3
Highlands Elementary 6.0
Gateway Center

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 CA.

Classroom Attention
? Student-teacher ratio calibrated against other private schools. Lower ratios mean more individual attention. (30% of overall score)
A+ 9.7 / 10
View breakdown
Student-Teacher Ratio 3.8:1
Instructional Commitment
? Total annual instructional hours based on school day length and days per year. (15% of overall score)
B- 5.2 / 10
View breakdown
School Day Length 6.6 hours
Annual Instructional Hours 1,188
Diversity & Inclusion
? Racial and ethnic diversity of the student body using Simpson's diversity index. (20% of overall score)
B 6.0 / 10
View breakdown
Diversity Index 53%
Community Context

Data Unavailable

School Profile
? Enrollment size and grade span breadth — indicators of program depth and peer community. (15% of overall score)
B 5.6 / 10
View breakdown
Enrollment 91
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 CA

Test Scores

Test score data not yet available for this school.

Student Demographics NCES PSS (SY 2021-22)

White 63.7%
Asian 24.2%
Hispanic 5.5%
Black 3.3%
Two or More 3.3%

Source: NCES Private School Survey (PSS)

Location

515 E POPLAR AVE, San Mateo, CA 94401

Nearby Alternatives

Families considering Stanbridge Academy may also want to explore other schools in the area. South Hillsborough (rated 9.4/10, 1.0 miles away, in nearby Hillsborough), which scores notably higher. Another option is North Shoreview Montessori (rated 9.1/10, 0.8 miles away), which scores notably higher. Additionally, Burlingame High (rated 9.0/10, 1.0 miles away, in nearby Burlingame), which scores notably higher. For more schools in San Mateo, see our San Mateo schools guide .

Nearby Schools

20 within 1.6 mi
School Distance Rating
Stanbridge Academy San Mateo 0.0 mi
San Mateo High San Mateo 0.1 mi 7.7
College Park Elementary San Mateo 0.2 mi 7.0
PACIFIC RIM INT'L SCHOOL San Mateo 0.4 mi
Genius Learning Burlingame 0.4 mi
EPISCOPAL DAY SCHOOL OF ST. MATTHEW San Mateo 0.7 mi 8.0
Episcopal Day School of St. Matthew San Mateo 0.7 mi
Washington Elementary Burlingame 0.7 mi 6.2
San Mateo Park Elementary San Mateo 0.8 mi 3.4
North Shoreview Montessori San Mateo 0.8 mi 9.1
ST CATHERINE OF SIENA SCHOOL Burlingame 0.8 mi 6.5
South Hillsborough Hillsborough 1.0 mi 9.4
Burlingame High Burlingame 1.0 mi 9.0
St. Matthew Catholic San Mateo 1.2 mi
ST TIMOTHY SCHOOL San Mateo 1.0 mi 6.3
Crystal Springs Uplands School Hillsborough 1.3 mi
CENTENNIAL MONTESSORI SCHOOL San Mateo 1.4 mi 7.4
Sunnybrae Elementary San Mateo 1.3 mi 5.0
TULANE MONTESSORI CHILDREN'S HOUSE San Mateo 1.5 mi
Baywood Elementary San Mateo 1.6 mi 5.1

Neighborhood Census ACS (2019-2023)

Census data for ZIP 94401 (ACS 2019-2023 5-Year Estimates) · Data sources

Median Income

$121,258

Median Home Value

$1,123,300

Median Rent

$2,713/mo

Population

35,628

College Educated

45.3%

Homeownership

44.4%

Avg Commute

27.1 min

Poverty Rate

10.9%

Median Age

35.9

Community Profile

The community surrounding Stanbridge Academy has a median household income of $121,258. It is a well-educated community where 45% of adults hold a bachelor's degree or higher. The median home value in the area is $1,123,300, with a median rent of $2,713/month. The area has a poverty rate of 10.9%. The average commute for residents is 27 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
HERITAGE BAPTIST ACADEMY Antioch, CA 7.2
KIPP Stockton Stockton, CA 7.2
ACACIAWOOD PREPARATORY ACADEMY Anaheim, CA 7.3
JCS - Cedar Cove Julian, CA 7.3
MARDAN SCHOOL Irvine, CA 7.3
Nova Education Center Novato, CA 7.3

Frequently Asked Questions

Common questions about Stanbridge Academy

What grades does Stanbridge Academy serve?

Stanbridge Academy serves students in grades Kindergarten through 12th.

How many students attend Stanbridge Academy?

Stanbridge Academy has an enrollment of approximately 91 students.

What is the student-teacher ratio at Stanbridge Academy?

The student-teacher ratio at Stanbridge Academy is 3.8:1. A lower ratio generally means more individual attention per student. The national average is approximately 11:1 for private schools.

How does Stanbridge Academy rank in CA?

Stanbridge Academy is ranked #397 out of 1,790 private schools in CA.

What is Stanbridge Academy's MySchoolScout rating?

Stanbridge Academy has a composite rating of 7.2 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 Stanbridge Academy a private school?

Yes, Stanbridge Academy is a private coeducational school with a Nonsectarian affiliation. Private schools are not required to participate in state standardized testing, so academic performance data may be limited compared to public schools.

Is Stanbridge Academy a religious school?

No, Stanbridge Academy is a nonsectarian (non-religious) private school.

11 schools nearby View map →

Neighborhood Context

Walk Score
84 Very Walkable
Transit Score
46 Some Transit
Bike Score
71 Very Bikeable
City Safety
High (2,131/100K)

Powered by Walk Score

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

Quick Facts NCES PSS (SY 2021-22)

Grades
Kindergarten – 12th
Enrollment
91
Gender Split
90% M / 10% F
Student-Teacher Ratio
3.8:1
Teachers (FTE)
24
Type
private
Coed Status
coed
Affiliation
Nonsectarian
School Day
6.6 hours
Days Per Year
180 days
Setting
Midsize City
County
SAN MATEO
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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