Arroyo Seco Junior High
Valencia, CA · William S. Hart Union High · Grades 7-8
217th of 1,294 California middle schools statewide · better than 83%· Stable
Arroyo Seco Junior High ranking
SchoolRow ranks Arroyo Seco Junior High 217th of 1,294 California middle schools for 2024–25, based on CAASPP 2024–25 English and Math results — better than 83% of middle schools statewide. Its statewide percentile went from 80th in 2015 to 83th in 2025.
Arroyo Seco Junior High test scores
Percent meeting or exceeding the state standard, CAASPP 2024–25 · 1,175 students tested
Arroyo Seco Junior High students
Racial and ethnic breakdown of 1,240 students (2023–24, NCES) — and how it has shifted since 2013
| Group | Trend | 2013 | 2023 | Change |
|---|---|---|---|---|
| Hispanic | 30.2% | 40.6% | ▲ 10.4 pts | |
| White | 56.4% | 36.1% | ▼ 20.3 pts | |
| Asian | 6.6% | 12.4% | ▲ 5.8 pts | |
| Two or more races | 5.0% | 7.2% | ▲ 2.2 pts | |
| Black | 1.6% | 3.3% | ▲ 1.7 pts |
Homes near Arroyo Seco Junior High
Typical home value $840K in zip 91354 as of 2026-05 · trend since 2000
Data Provided by Zillow Group
Middle schools near Arroyo Seco Junior High
Closest same-level schools, with 2024–25 state rank
- 9Rio Norte Junior HighWilliam S. Hart Union High · 1.8 mi away139th of 1,294
ELA 75% · Math 63% - 8Placerita Junior HighWilliam S. Hart Union High · 3.7 mi away305th of 1,294
ELA 62% · Math 47% - 7Sierra Vista Junior HighWilliam S. Hart Union High · 3.9 mi away467th of 1,294
ELA 53% · Math 34% - 8La Mesa Junior HighWilliam S. Hart Union High · 3.9 mi away354th of 1,294
ELA 59% · Math 43% - 10Rancho Pico Junior HighWilliam S. Hart Union High · 4.3 mi away95th of 1,294
ELA 81% · Math 66% - 8Castaic MiddleCastaic Union · 5 mi away364th of 1,294
ELA 61% · Math 40% - 5Olive Vista MiddleLos Angeles Unified · 10.2 mi away702nd of 1,294
ELA 41% · Math 28% - 9Robert Frost MiddleLos Angeles Unified · 10.3 mi away148th of 1,294
ELA 74% · Math 62%
Frequently asked questions
What school district is Arroyo Seco Junior High in?
Arroyo Seco Junior High is part of the William S. Hart Union High district in Valencia, California.
Is Arroyo Seco Junior High a good school?
SchoolRow ranks Arroyo Seco Junior High 217th of 1,294 California middle schools (better than 83% statewide) based on 2024–25 test results (CAASPP 2024–25).
What is the racial makeup of Arroyo Seco Junior High?
Hispanic 41%, White 36%, Asian 12%, Two or more races 7% (1,240 students, 2023–24).
How much do homes near Arroyo Seco Junior High cost?
The typical home value in zip code 91354 is $840K as of 2026-05 (Zillow ZHVI).
Sources: state education department data (CAASPP 2024–25, low-income, chronic absenteeism), National Center for Education Statistics via the Urban Institute (enrollment, demographics, staffing), Zillow Group (home values). Rankings are computed by SchoolRow from state English and Math results within grade level; they measure test performance, not everything that makes a school good.