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#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

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 metrics
Student Progress6.6Above Average40%
Year-over-year improvement in student test scores.
View breakdown
Years of Data2
Annual Change-0.78 pts/yr
Data Period2019–2024
TrendStable
Academics7.3Very Good35%
Student proficiency on state tests, adjusted for community poverty levels.
View breakdown
Math Proficiency53%
Reading/ELA Proficiency66.2%
Math vs. State Avg+19.1 pts
Reading vs. State Avg+18.9 pts
Overall Proficiency60%
Expected (poverty-adj.)67%
vs. Expected-7.1 pts
Adjusted Percentile61th
Resources & Environment3.8Fair25%
Student-teacher ratio, per-pupil spending, and attendance.
View breakdown
Student-Teacher Ratio24.3:1
Per-Pupil Spending$14,041

Arroyo Seco Junior High — Students at Arroyo Seco Junior High score 60% proficient, which is below what's typical for similar communities (expected: 67%).

How we calculate scores →

Equity & Diversity

Shown separately, not included in overall score

Free/Reduced Lunch

15.5%

Students qualifying for federal meal assistance

Test Scores CA CAASPP (2023-24)

Math Proficiency 53.5%
School
State
33.7%
ELA Proficiency 67.7%
School
State
46.8%

Based on 8 test records from CA state assessments. About our data

Proficiency Trend

→ Stable

Average proficiency (% at or above grade level) across Math & ELA over time.

2019
Math
55%
ELA
72%
2024
Math
53%
ELA
66.2%

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.

Overall Score
6.1/10
43th percentile in CA
Academic
7.3/10
7.3/10
Growth
6.6/10
Above average
Environment
3.8/10
Below average

Funding & Resources

Free/Reduced Lunch
Students eligible for subsidized meals
16%
Teaching Staff
24:1 student-teacher ratio
51 teachers

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.

11 schools nearby View map →

Neighborhood Context

Walk Score
34 Car-Dependent
Bike Score
30 Somewhat Bikeable
County Safety
Low (245/100K)

Powered by Walk Score

FBI UCR 2024. County-level only. Data >1 year old.

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
Data Year
2023–2024

District

William S. Hart Union High
District Enrollment
20,685
Schools in District
16
Per-Pupil Spending
$15,278
District Rank
#10 of 16

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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