CAPrimaryCalendar available · 248 events · Auto-updating
Armstrong Elementary — School Profile & District Info
Primary|Diamond Bar, California|Pomona Unified
Diamond Bar, CA 91765
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School Profile
Grades
K–6
Enrollment
249
Student:Teacher
20.8:1
Locale
Suburban
District
Pomona UnifiedEcon. Disadvantaged
69.1%
Phone
(909)397-4563School Statistics
Programs & Activities (SY 2021-22)
Gifted & Talented
Student-Teacher Ratio: 13.9:1
Better than average in CADistrict Finance (FY 2023)
Per-Pupil Spending
$20,301
District-level data
Funding Sources
Federal 17%State 62%Local 21%
Community Context
Median Home Value
$954,296
-0.8% YoY
Los Angeles, CA metro area · Zillow Feb 2026
Community Need Level
Elevated
CDC/ATSDR Social Vulnerability Index 2022
Enrollment Trend (2014-2025)
251
Current enrollment
Declining(-14% 5yr)Frequently Asked Questions about Armstrong Elementary
Armstrong Elementary currently enrolls 249 students across Primary grade levels. The school operates under the local school district in CA.
Calendar Guides
School profiles: Data from NCES Common Core of Data. Calendar events from district calendar sources, updated automatically.