Average
#5401 of 9,533 schools in CA
Arroyo Seco Junior High
Middle School · William S. Hart Union High
27171 North Vista Delgado Dr., Valencia, CA 91354
Enrollment
1,240
Student-Teacher
24.3:1
Score
6.1
Grades
7th – 8th
Enrollment
1,240
Student-Teacher
24.3:1
Score
6.1
Grades
7th – 8th
Updated
2022-23
Updated 2022-23
How this school compares
In Valencia
#11 of 12
public schools
California middle schools
#789 of 1,349
In district
#10 of 16
William S. Hart Union High
Equity
7.8 / 10
Very strong
About Arroyo Seco Junior High
Arroyo Seco Junior High serves 1,240 students in grades 7 and 8 in Valencia, California. With 51 full-time equivalent teachers, the school maintains a student-teacher ratio of 24.3 to 1. This regular public middle school has earned solid academic recognition, ranking in the 75th percentile among California schools at #2418 out of 9566 statewide.
The school demonstrates strong academic performance with a MySchoolScout rating of 7.2 out of 10 and an academic score of 8.4 out of 10. Students show particularly strong results in English Language Arts, with 66% achieving proficiency or above across grade levels. In mathematics, 53% of students perform at proficient or advanced levels, providing a solid foundation for high school coursework.
Arroyo Seco serves families in an affluent community where the median household income reaches $145,442 and 54% of residents hold bachelor's degrees or higher. The neighborhood's low poverty rate of 5% reflects the area's economic stability. Located on North Vista Delgado Drive in Valencia's large suburban setting, the school benefits from being part of a well-established residential community in Los Angeles County, where median home values of $736,800 reflect the area's desirability among families prioritizing education.
What Parents Should Know
The student-teacher ratio at Arroyo Seco Junior High is 24.3:1, which is higher than the national average. This may mean larger class sizes, so parents should ask about classroom support, teaching assistants, and how the school differentiates instruction for students who need extra help.
Score Breakdown
Full Profile · 3/3 metricsView breakdown
View breakdown
View breakdown
Arroyo Seco Junior High — Students at Arroyo Seco Junior High score 60% proficient, which is below what's typical for similar communities (expected: 67%).
Equity & Diversity
Shown separately, not included in overall scoreFree/Reduced Lunch
15.5%
Students qualifying for federal meal assistance
Test Scores CA CAASPP (2023-24)
Based on 8 test records from CA state assessments. About our data
Proficiency Trend
→ StableAverage proficiency (% at or above grade level) across Math & ELA over time.
Source: EdFacts (NCES) and state assessment data. Growth score: 6.6/10.
How Arroyo Seco Junior High Compares
See how Arroyo Seco Junior High performs across key quality dimensions compared to state benchmarks.
Funding & Resources
Performance Trends
Math proficiency has declined from 55% (2019) to 52.98% (2024). Reading/ELA proficiency has declined from 72% (2019) to 66.2% (2024).
Location
27171 North Vista Delgado Dr., Valencia, CA 91354
Nearby Alternatives
Families considering Arroyo Seco Junior High may also want to explore other middle schools in the area. Charles Helmers Elementary (rated 8.4/10, 0.9 miles away), which scores notably higher. Another option is Valencia High (rated 8.3/10, 1.5 miles away), which scores notably higher. Additionally, Tesoro del Valle Elementary (rated 8.1/10, 2.2 miles away), which scores notably higher. For more schools in Valencia, see our Valencia schools guide .
Nearby Schools
20 within 2.4 mi| School | Distance | Rating |
|---|---|---|
| Santa Clarita Elementary Saugus | 0.2 mi | 7.4 |
| James Foster Elementary Saugus | 0.8 mi | 7.3 |
| Emblem Academy Saugus | 0.9 mi | 7.8 |
| Highlands Elementary Saugus | 0.8 mi | 7.6 |
| Charles Helmers Elementary Valencia | 0.9 mi | 8.4 |
| North Park Elementary Valencia | 1.1 mi | 8.0 |
| MONTESSORI ON COPPER HILL Santa Clarita | 1.2 mi | — |
| Saugus High Saugus | 1.1 mi | 6.4 |
| Bridgeport Elementary Valencia | 1.3 mi | 6.4 |
| LEGACY CHRISTIAN ACADEMY Valencia | 1.5 mi | 6.2 |
| Valencia High Valencia | 1.5 mi | 8.3 |
| Opportunities for Learning - William S. Hart Covina | 1.5 mi | 5.3 |
| Alpha-Kidz International Valencia | 1.6 mi | — |
| Rio Norte Junior High Santa Clarita | 1.8 mi | 6.9 |
| Mission View Public Lancaster | 2.0 mi | 5.8 |
| Rosedell Elementary Saugus | 1.8 mi | 7.7 |
| Mountainview Elementary Saugus | 2.3 mi | 7.4 |
| MONTESSORI OF VALENCIA Valencia | 2.0 mi | 5.2 |
| Tesoro del Valle Elementary Valencia | 2.2 mi | 8.1 |
| Valencia Valley Elementary Valencia | 2.4 mi | 5.8 |
Neighborhood Census ACS (2019-2023)
Census data for ZIP 91354 (ACS 2019-2023 5-Year Estimates) · Data sources
Median Income
$148,818
Median Home Value
$803,000
Median Rent
$2,923/mo
Population
33,059
College Educated
53.9%
Homeownership
77.7%
Avg Commute
34.7 min
Poverty Rate
5.1%
Median Age
39.6
Community Profile
The community surrounding Arroyo Seco Junior High has a median household income of $148,818. It is a well-educated community where 54% of adults hold a bachelor's degree or higher. The median home value in the area is $803,000, with a median rent of $2,923/month. The local poverty rate of 5.1% is relatively low. The average commute in the area is 35 minutes, which is above the national average. Source: U.S. Census ACS 2022 5-Year Estimates.
Similar Schools
Schools in the same state with comparable level, size, and ratings
| School | Rating |
|---|---|
| Harriet G. Eddy Middle Elk Grove, CA | 6.1 |
| Hillside Middle Simi Valley, CA | 6.1 |
| John Muir Middle San Leandro, CA | 6.1 |
| Kastner Intermediate Fresno, CA | 6.1 |
| Luther Burbank Middle Burbank, CA | 6.1 |
| Mitchell Intermediate Atwater, CA | 6.1 |
Frequently Asked Questions
Common questions about Arroyo Seco Junior High
What grades does Arroyo Seco Junior High serve?
Arroyo Seco Junior High serves students in grades 7th through 8th.
How many students attend Arroyo Seco Junior High?
Arroyo Seco Junior High has an enrollment of approximately 1,240 students.
What is the student-teacher ratio at Arroyo Seco Junior High?
The student-teacher ratio at Arroyo Seco Junior High is 24.3:1. A lower ratio generally means more individual attention per student. The national average is approximately 16:1 for public schools.
How does Arroyo Seco Junior High rank in CA?
Arroyo Seco Junior High is ranked #5401 out of 9,533 schools in CA.
What is Arroyo Seco Junior High's MySchoolScout rating?
Arroyo Seco Junior High has a composite rating of 6.1 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.
What are the test scores at Arroyo Seco Junior High?
Based on the most recent state assessment data, Arroyo Seco Junior High has 53.5% math proficiency and 67.7% reading/ELA proficiency.
Is Arroyo Seco Junior High a charter school?
No, Arroyo Seco Junior High is not a charter school. It is a traditional public school operated by the local school district.
Is Arroyo Seco Junior High a Title I school?
No, Arroyo Seco Junior High is not currently a Title I school.
What does the Free & Reduced Lunch percentage mean for Arroyo Seco Junior High?
15.5% of students at Arroyo Seco Junior High qualify for free or reduced-price lunch. This is a commonly used indicator of economic need and provides important context when interpreting test scores.
Explore More Schools
Neighborhood Context
Quick Facts NCES CCD (SY 2022-23)
- Grades
- 7th – 8th
- Enrollment
- 1,240
- Student-Teacher Ratio
- 24.3:1
- Teachers (FTE)
- 51
- Free/Reduced Lunch
- 15.5%
- Type
- regular
- Setting
- Large Suburb
- County
- Los Angeles County
- Phone
- (661) 296-0991
- Data Year
- 2023–2024
Resources & Links
District
William S. Hart Union High- District Enrollment
- 20,685
- Schools in District
- 16
- Per-Pupil Spending
- $15,278
- District Rank
- #10 of 16
Other Schools in This District
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 methodologyRelated reading
- Best Elementary Schools in America: 2026 Rankingsbest schools
- Best Public Schools in California 2026: Top-Ranked Elementary, Middle & High Schoolsbest schools
- Best School Districts to Move To in 2026: A Data-Driven Guidebest schools
- Best Schools in Los Angeles, CA — 2026 Rankingsbest schools
- Best Schools in San Diego, CA — 2026 Rankingsbest schools
Get school insights in your inbox
New rankings, best-schools lists, and parent guides — delivered free. No spam, unsubscribe anytime.
We respect your privacy. Unsubscribe at any time.