Rio Norte Junior High
Public · Grades 7–8 · 1,138 students
Arroyo Seco Junior High
27171 North Vista Delgado Dr., Valencia, CA 91354
Grades
7–8
Middle
Students
1,239
Enrolled 2024–25
Students per teacher
24.4 : 1
Full-time teachers
District
William S. Hart Union High
Los Angeles County
Schola Grade A · Excellent
Letter grade (A–F) · compared with 1,332 California middle schools · How we grade
Percentiles compare this school with other California middle schools; the line marks the middle. Data: test scores 2021–22, graduation and absenteeism 2022–23 (U.S. Department of Education, EDFacts); coursework 2023–24 (Civil Rights Data Collection); staffing 2024–25 (NCES).
About Arroyo Seco Junior High
Arroyo Seco Junior High is a public middle school in Valencia, California, serving grades 7–8. It is part of William S. Hart Union High. The school is located in a large suburb in Los Angeles County.
In the 2024–25 school year, 1,239 students were enrolled, with about 24.4 students for every full-time teacher. That ratio is larger than the typical California middle school (21.0 students per teacher). Its Schola Grade is A (excellent), compared with 1,332 California middle schools.
Grades & enrollment
Students per grade, 2024–25Grades 7–8
Location & nearby schools
School details
- Type
- Public School · What this means
- Level
- Middle
- Grades offered
- 7–8
- Enrollment (2024–25)
- 1,239 students
- Students per teacher
- 24.4 to 1
- Charter school
- No
- Magnet school
- No
- Locale
- Suburb — Large
- School district
- William S. Hart Union High
- County
- Los Angeles County
- NCES school ID
- 064251006956
Schools near Arroyo Seco Junior High
All 15 schools in Valencia →
Placerita Junior High
Public · Grades 7–8 · 940 students
La Mesa Junior High
Public · Grades 7–8 · 1,017 students
Sierra Vista Junior High
Public · Grades 7–8 · 946 students
Rancho Pico Junior High
Public · Grades 7–8 · 842 students
Castaic Middle
Public · Grades 7–8 · 451 students
School data comes from the U.S. Department of Education: the National Center for Education Statistics (NCES) Common Core of Data and EDGE school locations (2024–25) and Private School Survey (2023–24), the Civil Rights Data Collection (2023–24), and EDFacts (test results 2021–22; graduation and chronic absenteeism 2022–23), plus other public sources. Please contact the school to confirm enrollment, programs, and other details. How we source data.