Very Good
#170 of 1,790 private schools in CA
Top 9% of private schools
St Marks School - Altadena
Elementary School
1050 E ALTADENA DR, Altadena, CA 91001
Estimated academic score. This school does not have standardized test data. Based on 8 schools in Altadena. Learn more
Enrollment
210
Student-Teacher
9.7:1
Score
7.7
Grades
Kindergarten – 6th
Enrollment
210
Student-Teacher
9.7:1
Score
7.7
Grades
Kindergarten – 6th
Updated
2021-22
Updated 2021-22
How this school compares
In Altadena
#2 of 6
public schools
California elementary schools
#88 of 1,102
Academic performance
7.0 / 10
Strong
About St Marks School - Altadena
St. Marks School - Altadena serves 210 students in kindergarten through sixth grade in this well-established Los Angeles County community. With 22 full-time equivalent teachers, the school maintains an impressive 9.7:1 student-teacher ratio, allowing for more individualized attention and smaller class sizes than many elementary schools.
The school has earned strong recognition for its academic performance, receiving a 9.0 out of 10 rating from MySchoolScout and ranking #607 out of 1,790 elementary schools statewide, placing it in the 66th percentile among California schools. This solid academic standing reflects the school's commitment to providing quality education for its elementary-aged students. St.
Marks School - Altadena draws families from a highly educated community where 52% of residents hold bachelor's degrees or higher. The surrounding neighborhood demonstrates strong economic stability with a median household income of $129,030 and a low poverty rate of 7.1%. Home values in the area reflect the desirability of the location, with a median home value of over $1 million.
The school is situated on East Altadena Drive in Altadena's large suburban setting, offering families the benefits of a close-knit community atmosphere while maintaining proximity to the greater Los Angeles metropolitan area.
What Parents Should Know
With a student-teacher ratio of 9.7:1, St Marks School - Altadena 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 Marks School - Altadena 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
BetaHow St Marks School - Altadena compares to 8 public schools serving similar grades in Altadena, CA
Student Demographics
Nearby Elementary Schools
| School | Rating |
|---|---|
| St Marks School - Altadena (this school) | 7.7 |
| Altadena Elementary | 8.1 |
| Charles W. Eliot Middle | 6.4 |
| Aveson School of Leaders | 8.6 |
| Pasadena Rosebud Academy | 9.1 |
| OCS - South | 7.2 |
| Aveson Global Leadership Academy | 5.7 |
| Odyssey Charter | 7.5 |
| Mary W. Jackson STEAM Multilingual Magnet Elementary | 7.8 |
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.
Data Unavailable
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)
Source: NCES Private School Survey (PSS)
Location
1050 E ALTADENA DR, Altadena, CA 91001
Nearby Alternatives
Families considering St Marks School - Altadena may also want to explore other elementary schools in the area. Pasadena Rosebud Academy (rated 9.1/10, 1.1 miles away), which scores notably higher. Another option is Aveson School of Leaders (rated 8.6/10, 1.0 miles away), which scores slightly higher. Additionally, STRATFORD SCHOOL- ALTADENA ALLEN (rated 8.2/10, 1.2 miles away), which scores slightly higher. For more schools in Altadena, see our Altadena schools guide .
Nearby Schools
20 within 1.4 mi| School | Distance | Rating |
|---|---|---|
| Sahag-Mesrob Armenian Christian School Altadena | 0.0 mi | — |
| SAHAG-MESROB ARMENIAN CHRISTIAN SCHOOL Altadena | 0.0 mi | 7.3 |
| Saint Mark's School Altadena | 0.0 mi | — |
| Charles W. Eliot Middle Altadena | 0.5 mi | 6.4 |
| Altadena Elementary Altadena | 0.4 mi | 8.1 |
| St Elizabeth Parish School Altadena | 0.8 mi | — |
| ST ELIZABETH SCHOOL Altadena | 0.9 mi | 6.9 |
| PASADENA WALDORF SCHOOL Altadena | 0.9 mi | 7.3 |
| OAK KNOLL MONTESSORI SCHOOL Altadena | 1.1 mi | 6.3 |
| Pasadena Rosebud Academy Altadena | 1.1 mi | 9.1 |
| Aveson School of Leaders Altadena | 1.0 mi | 8.6 |
| FAIR OAKS SCHOOL Altadena | 1.1 mi | — |
| EF Academy Pasadena Pasadena | 1.3 mi | — |
| STRATFORD SCHOOL- ALTADENA ALLEN Altadena | 1.2 mi | 8.2 |
| Longfellow (Henry W.) Elementary Pasadena | 1.4 mi | 7.7 |
| OCS - South Altadena | 1.2 mi | 7.2 |
| PASADENA CHRISTIAN SCHOOL Pasadena | 1.4 mi | 7.6 |
| Tabernacle Of David Christian Academy Pasadena | 1.6 mi | — |
| Harriet Tubman Pasadena | 1.4 mi | — |
| HARRIET TUBMAN PRESCHOOL & ELEMENTARY Pasadena | 1.4 mi | — |
Neighborhood Census ACS (2019-2023)
Census data for ZIP 91001 (ACS 2019-2023 5-Year Estimates) · Data sources
Median Income
$133,840
Median Home Value
$1,085,000
Median Rent
$2,298/mo
Population
36,402
College Educated
52.1%
Homeownership
80.5%
Avg Commute
27.9 min
Poverty Rate
7.2%
Median Age
46.1
Community Profile
The community surrounding St Marks School - Altadena has a median household income of $133,840. It is a well-educated community where 52% of adults hold a bachelor's degree or higher. The median home value in the area is $1,085,000, with a median rent of $2,298/month. The local poverty rate of 7.2% is relatively low. The average commute for residents is 28 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 |
|---|---|
| Alta Mesa Elementary Redding, CA | 7.7 |
| Arellanes (Don Juan Bautista) Elementary Santa Maria, CA | 7.7 |
| Arlington Heights Elementary Los Angeles, CA | 7.7 |
| Arturo Sanchez Elementary Norwalk, CA | 7.7 |
| BARNHART SCHOOL Arcadia, CA | 7.7 |
| Burton Street Elementary Panorama City, CA | 7.7 |
Frequently Asked Questions
Common questions about St Marks School - Altadena
What grades does St Marks School - Altadena serve?
St Marks School - Altadena serves students in grades Kindergarten through 6th.
How many students attend St Marks School - Altadena?
St Marks School - Altadena has an enrollment of approximately 210 students.
What is the student-teacher ratio at St Marks School - Altadena?
The student-teacher ratio at St Marks School - Altadena is 9.7:1. A lower ratio generally means more individual attention per student. The national average is approximately 11:1 for private schools.
How does St Marks School - Altadena rank in CA?
St Marks School - Altadena is ranked #170 out of 1,790 private schools in CA.
What is St Marks School - Altadena's MySchoolScout rating?
St Marks School - Altadena has a composite rating of 7.7 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 Marks School - Altadena a private school?
Yes, St Marks School - Altadena is a private coeducational school with a Episcopal 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 Marks School - Altadena a religious school?
St Marks School - Altadena has a Episcopal religious affiliation.
Explore More Schools
Neighborhood Context
Quick Facts NCES PSS (SY 2021-22)
- Grades
- Kindergarten – 6th
- Enrollment
- 210
- Gender Split
- 50% M / 50% F
- Student-Teacher Ratio
- 9.7:1
- Teachers (FTE)
- 22
- Type
- private
- Coed Status
- coed
- Affiliation
- Episcopal
- School Day
- 7 hours
- Days Per Year
- 180 days
- Setting
- Large Suburb
- County
- LOS ANGELES
- Phone
- (626) 798-8858
- Data Year
- 2022–2023
Resources & Links
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.
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