Armstrong Elementary
Diamond Bar, CA · Pomona Unified
Regular public school · Grades K-6 · Suburb, large
2,989th of 5,659 California elementary schools statewide · better than 47%▼ Declining
22750 Beaverhead Dr., Diamond Bar, CA 91765
(909) 397-4563Official website ↗NCES ID 063132004836Directory 2023–24
SchoolRow ranks Armstrong Elementary 2,989th of 5,659 California elementary schools for 2024–25, based on CAASPP 2024–25 English and Math results — better than 47% of elementary schools statewide. Its statewide percentile went from 66th in 2015 to 47th in 2025 — declining.
Percent meeting or exceeding the state standard, CAASPP 2024–25 · 116 students tested
Racial and ethnic breakdown of 249 students (2023–24, NCES) — history since 1987, with comparable seven-category changes from 2010
| Group | Trend | 2010 | 2023 | Change |
|---|---|---|---|---|
| Hispanic | 57.2% | 60.6% | ▲ 3.4 pts | |
| Asian | 17.8% | 14.5% | ▼ 3.3 pts | |
| White | 13.4% | 9.6% | ▼ 3.8 pts | |
| Two or more races | 5.5% | 9.6% | ▲ 4.1 pts | |
| Black | 5.5% | 5.6% | ▲ 0.1 pts |
NCES history for this school begins in 1987. Race categories changed by 2010: earlier data combines Asian and Pacific Islander students and does not consistently identify multiracial students. The chart retains that history, while the change table uses 2010 onward.
Typical home value $1.03M in zip 91765 as of 2026-05 · trend since 2000
Data Provided by Zillow Group
Closest same-level schools, with 2024–25 state rank · ▲▼ = points better or worse than Armstrong Elementary
- #2001Golden Springs ElementaryPomona Unified · 1 mi away2,001st of 5,659
ELA 60% ▲13 · Math 38% ▲9Compare - #160Maple Hill ElementaryWalnut Valley Unified · 1.8 mi away160th of 5,659
ELA 83% ▲36 · Math 83% ▲54Compare - #344Pantera ElementaryPomona Unified · 1.8 mi away344th of 5,659
ELA 81% ▲34 · Math 74% ▲45Compare - #283Quail Summit ElementaryWalnut Valley Unified · 1.8 mi away283rd of 5,659
ELA 77% ▲30 · Math 82% ▲53Compare - #1904Ranch Hills ElementaryPomona Unified · 2.1 mi away1,904th of 5,659
ELA 59% ▲12 · Math 42% ▲13Compare - #408Walnut ElementaryWalnut Valley Unified · 2.4 mi away408th of 5,659
ELA 75% ▲28 · Math 77% ▲48Compare - #4901Kellogg Polytechnic ElementaryPomona Unified · 2.5 mi away4,901st of 5,659
ELA 29% ▼18 · Math 15% ▼14Compare - #859Vejar ElementaryWalnut Valley Unified · 2.5 mi away859th of 5,659
ELA 67% ▲20 · Math 67% ▲38Compare
What school district is Armstrong Elementary in?
Armstrong Elementary is part of the Pomona Unified district in Diamond Bar, California.
Is Armstrong Elementary a good school?
SchoolRow ranks Armstrong Elementary 2,989th of 5,659 California elementary schools (better than 47% statewide) based on 2024–25 test results (CAASPP 2024–25).
What is the racial makeup of Armstrong Elementary?
Hispanic 61%, Asian 15%, White 10%, Two or more races 10% (249 students, 2023–24).
How much do homes near Armstrong Elementary cost?
The typical home value in zip code 91765 is $1.03M 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.