Armstrong Elementary

Armstrong Elementary is a close-knit primary school in Reston, Virginia, operated by Fairfax County Public Schools. The school serves 357 students in grades pre-K through 6. Enrollment runs roughly 28% leaner than the state mean of about 499.

Across the 199 schools in Fairfax County Public Schools (179,323 students total), Armstrong Elementary accounts for its share of the district's footprint.

On demographics, Armstrong Elementary reports that White students make up the majority at 60%. Other groups include 15% Hispanic, 8% Black, 8% multiracial, 7% Asian. By comparison, Fairfax County as a whole is about 49% White, so the school skews visibly more White than its surroundings.

Looking at school resources, Staff filings list 35 full-time-equivalent teachers, which works out to roughly 10.1:1 students per teacher. That figure is tighter than the state norm's 13.8:1 average. An estimated 19% of students are eligible for free or reduced-price lunch, often used as a Title I proxy. By comparison, Fairfax County runs at roughly 37%, so the school's eligibility rate is below the surrounding baseline.

On a residual basis (actual vs predicted given the student mix), Armstrong Elementary performs roughly as the BeatsExpectations model predicts for a school with this FRL share. The predicted value is around 82.8%, the actual is 73.5%, a residual of -9.3 points.

In the broader community, ACS estimates for Fairfax County put median household income runs about $153,637, 65% of adults hold a bachelor's degree or higher, and the poverty rate sits near 4%. Across Fairfax County's 222 public schools (combined enrollment of about 174,475 students), Armstrong Elementary is one campus in the mix.

Herndon High is the nearest neighboring public school, about 1.0 miles from this campus. Counting just inside five miles, 8 other public schools cluster around Armstrong Elementary. On composite proficiency, Armstrong Elementary comes 3rd of 9 in the immediate cluster, higher than the nearby-schools average of 67.5%.

Geographically, the school is in an urban area.

Five-year trend. Looking back 7 years, enrollment at Armstrong Elementary has ticked down 22%, going from 460 students in 2018 to 357 in 2025. The White share of enrollment declined from 68% to 60% over that span. Class-load math has narrowed: from 11.8:1 in 2018 to 10.1:1 in 2025.

On allk12, members of the Armstrong Elementary community share and discuss pickup logistics, teacher feedback, and after-school programs. Members of the school community can share what they know.