SA
Middle SchoolsGrades 7-8

Arroyo Seco Junior High

William S. Hart Union High · Los Angeles County · 27171 North Vista Delgado Drive, Valencia, CA 91354-2244

(661) 296-0991 · www.arroyosecojuniorhigh.org

9/10
#210
Rank 210 out of 1,315
Top 16%
English Language Arts9/10 · #220 · 83rd percentile
Mathematics9/10 · #212 · 84th percentile
Science9/10 · #215 · 84th percentile

English Language Arts

Math Trend

Science Trend

School Overview

Arroyo Seco Junior High sits in the heart of Valencia, one of Santa Clarita Valley's most family-friendly master-planned communities, where tree-lined paseos and highly engaged parents set the tone for school life. As part of the well-regarded William S. Hart Union district, this 7th-and-8th-grade campus consistently performs in the top fifth of California middle schools across English, math, and science — making it a strong landing spot for students heading toward the district's competitive high schools. Families who prioritize academics without the intensity of a magnet program, and who want a suburban environment with easy access to both LA and the outdoors, tend to feel right at home here.

Student Demographics

1,166 students tested · 2024-25 school year

Ethnicity

Hispanic
441 (38%)
White
440 (38%)
Multiple Races
85 (7%)
Filipino
81 (7%)
Asian
80 (7%)
African American
36 (3%)
Other
4 (0%)

Key Indicators

English Learners88 (8%)
Socioeconomically Disadvantaged215 (18%)
Students with Disabilities169 (14%)

Staff & Teachers(2024-25)

1,239
Enrollment
51.7
Teachers (FTE)
24:1
Student-Staff Ratio
3
Administrators (FTE)
27.5
Avg Class Size*(2023-24)

Community Enrichment Programs

This supplementary score measures the availability of enrichment programs — such as tutoring, music, dance, sports, and arts — within 3 miles of the school. Schools in communities with more diverse and accessible programs score higher.

Nearby Programs7/10 · #519 · 62nd percentile

136 programs within 3 miles. Ranked among Middle Schools in California.

Nearby Libraries

No programs found