Enrollment
882
Virginia · 2024-25 NCES data
Middle school (grades 6-8) · Chantilly, VA
Rocky Run Middle
Federal NCES profile for Rocky Run Middle, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 63/100.
2024-25 NCES dataMiddle school (grades 6-8)NCES 510126001841
👥 S:T ratio 41
🌟 Gifted program 70
🎓 Counselors 65
📋 Attendance 76
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Rocky Run Middle earns 63/100 on the Resource Investment Index, with class sizes near the Virginia median.
- #1 of 3
- middle schools in Chantilly · Resource Index
- 63
- Resource Index · Higher
- 14.7:1
- students per teacher
- 16.5%
- free-lunch eligible
Rocky Run Middle has class sizes near the Virginia median. Computed live against every Virginia school reporting to NCES.
By Resource Investment Index, Rocky Run Middle ranks #1 of 3 middle schools in Chantilly, VA.
School address
District: Fairfax County Public Schools · Virginia
NCES ID 510126001841 Verify on NCES CCD record →
Teachers (FTE)
60.0
Federal CCD staff survey
Students per teacher
14.7:1
vs 13.9:1 Virginia avg
+6% vs state
Free-lunch eligible
16.5%
vs 57.6% Virginia avg
-71% vs state
Student-teacher ratio in context
How Rocky Run Middle compares with Virginia and U.S. medians
What stands out at Rocky Run Middle
Rocky Run Middle is a lower-poverty, mid-sized middle school in Chantilly, Virginia, enrolling 882 students.
Class loads run somewhat heavier than typical: 14.7:1 puts it in the larger third of Virginia schools by student-teacher ratio.
Comparatively few students face economic hardship here, 16.5% free-meal eligibility runs 71% below the Virginia average.
Enrollment of 882 puts it in the larger third of Virginia schools by headcount.
Its Resource Investment Index outscores 96% of the 1,868 Virginia schools with a score on record, a top-tier result on this measure.
Among 259 similarly sized, similarly resourced-need Virginia schools statewide, it ranks #12, a top-tier result once campus size and economic need are matched.
Its student body is led by Asian (40%) and White (34%) (diversity index 70/100).
Counselor coverage is strong, about 176 students per counselor, inside the American School Counselor Association's recommended 250:1.
Attendance holds up well here: only 9.5% of students were chronically absent, below the typical post-pandemic national figure.
The surrounding Fairfax County Public Schools spends $17,977 per pupil, 23% above the Virginia average, a better-resourced district than most.
The federal civil-rights collection also records 1 expulsion at this campus for 2021-22.
Among Chantilly's middle schools, it stands alongside J. Michael Lunsford Middle (1,182 students): Rocky Run Middle is smaller than that campus by headcount and runs heavier classes (14.7:1 vs 12.7:1).
Fairfax County Public Schools also operates Lake Braddock Secondary (4,411 students) and Robinson Secondary (3,710 students) alongside Rocky Run Middle.
Sourced from NCES CCD, CRDC, and F-33 (federal records, not a quality verdict). How we source and compute this.
Source: National Center for Education Statistics Common Core of Data + CRDC + F-33 · 2024-25
How Rocky Run Middle compares
Rocky Run Middle on the metrics families compare, against Virginia and U.S. means.
| Metric | This school | vs Virginia | Virginia avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 14.7:1 | ▲ 6% | 13.9:1 | 15.7:1 |
| Free-lunch eligible | 16.5% | ▼ 71% | 57.6% | 51.7% |
| Enrollment | 882 | top 19% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
14.7:1
Leaner classes than 50% of US schools, a middle-of-the-pack class size.
882
Bigger than 88% of US schools by enrollment, a large campus nationally.
Equity indicators (what these measure)
Economic need
16.5%
free-lunch eligible
- 71% below the Virginia average of 57.6%
Below the 40% Title I threshold, among the lower-need profiles in the state; federal aid targets individual qualifying students rather than schoolwide programs.
Staffing depth
14.7:1
students per teacher
- 6% above state mean
Top 64% in Virginia - lower ratio than 36% of state schools
Close to the 15:1 benchmark most often cited for individualized attention.
Engagement
9.5%
chronically absent (missed 10%+ of school days)
In the 5-10% range, close to the pre-pandemic national baseline.
Funding equity
$17,977
per pupil, district-wide
- above Virginia avg of $14,649
Somewhat above the U.S. public-school average, reflecting higher local or state investment per enrolled student.
Support staff
Counselors5.0 FTE
Per 176 students, the combined health-and-guidance staffing load for this school.
Discipline context
25
in-school suspensions + 8 out-of-school
Suspension rate: 2.8 per 100 students. Combined in-school and out-of-school rate: 3.7 per 100 students. Reported via the Civil Rights Data Collection. Includes 1 expulsion.
Overview
- Common Core of Data (June 2026): enrollment, staffing, and the student-teacher ratio above.
- Civil Rights Data Collection: discipline counts and program access (AP, gifted, special education).
- F-33 School District Finance Survey: the district-wide per-pupil spending figures below.
Three separate federal collections, each on its own reporting cadence - which is why this school's numbers line up on a consistent basis against every other school and state on this site, rather than mixing figures pulled from different survey years.
Student demographics
Asian 39.7%
White 33.6%
Hispanic or Latino 16.4%
African American 5.4%
Two or More 4.6%
Native Hawaiian / Pacific Islander 0.2%
Largest group: Asian at 39.7% of enrollment.
Student-body diversity index 69.8/100
Simpson diversity index - at 69.8, Rocky Run Middle is more mixed than the Virginia school average of 53.7.
Programs
Gifted & talented Yes
Funding & spending
District-wide per-pupil expenditure for Fairfax County Public Schools, which includes Rocky Run Middle.
$17,977
Per student
+23%
vs Virginia
Avg $14,649
+8%
vs U.S.
Avg $16,593
Revenue mix
Local 66.6%
State 23.3%
Federal 10.1%
Source: NCES F-33 School District Finance Survey District-level finance · FY 2021-22 Per-pupil expenditure reflects the district-wide average. Individual school budgets are not reported at the federal level.
How Rocky Run Middle Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Lake Braddock Secondary | Larger | Similar economic need | Higher S:T ratio |
| Robinson Secondary | Larger | Similar economic need | Higher S:T ratio |
| Hayfield Secondary | Larger | Similar economic need | Higher S:T ratio |
| Chantilly High | Larger | Similar economic need | Higher S:T ratio |
| West Springfield High | Larger | Similar economic need | Higher S:T ratio |
Comparisons are relative to Rocky Run Middle's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 4,411
- Students per teacher
- 17:1
- Resource Index
- 57/100
- Enrollment
- 3,710
- Students per teacher
- 17.1:1
- Resource Index
- 54/100
- Enrollment
- 3,256
- Students per teacher
- 17.3:1
- Resource Index
- 53/100
- Enrollment
- 2,937
- Students per teacher
- 16.2:1
- Resource Index
- 47/100
- Enrollment
- 2,799
- Students per teacher
- 18.5:1
- Resource Index
- 45/100
Similar middle schools in Chantilly
2 comparable middle schools (grades 6-8) serving the same city.
Similar middle schools statewide
Matched by enrollment size and by staffing ratio across all of Virginia, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~882 students)
Similar student-teacher ratio (~14.7:1)
Next steps
Verify locally before acting on Rocky Run Middle's federal record.
- Compare Rocky Run Middle against another school. Compare schools
- Fairfax County Public Schools's spending and staffing shape this school. District profile
- Confirm current enrollment and boundaries with the school. Choosing guide
Federal record (CCD 2024-25, CRDC 2021-22) - PlainSchools assigns no subjective rating; the composite quality score is a transparent, reproducible index computed from this cited federal data.
Frequently asked questions about Rocky Run Middle
How many students attend Rocky Run Middle?
Rocky Run Middle has 882 students enrolled. It is a middle school in Chantilly, VA.
What is the student-teacher ratio at Rocky Run Middle?
The student-teacher ratio at Rocky Run Middle is 14.7:1, which is 6% higher than the Virginia average of 13.9:1 and 6% lower than the national average of 15.7:1.
What percentage of students receive free lunch at Rocky Run Middle?
16.5% of students at Rocky Run Middle are eligible for free lunch, compared to the Virginia average of 57.6%.
What is the racial and ethnic makeup of Rocky Run Middle?
The largest demographic group at Rocky Run Middle is Asian at 39.7% of enrollment, in Chantilly, VA. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 69.8/100.
What is the Resource Investment Index for Rocky Run Middle?
Rocky Run Middle has a Resource Investment Index of 63/100 (higher reported resources relative to schools nationally) based on 4 factors: student-teacher ratio, counselor availability, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Rocky Run Middle rank among middle schools in Chantilly?
By Resource Investment Index, Rocky Run Middle ranks #1 of 3 middle schools in Chantilly, VA. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all middle schools in Chantilly on the city page.
Is Rocky Run Middle a good school?
Rocky Run Middle earns 63/100 on the Resource Investment Index, with class sizes near the Virginia median. This is a resource snapshot, not an academic rating; see the Resource Investment Index question above for what the number does and doesn't measure.
What other schools are in Fairfax County Public Schools?
Besides Rocky Run Middle, Fairfax County Public Schools also operates Lake Braddock Secondary (4,411 students), Robinson Secondary (3,710 students), and Hayfield Secondary (3,256 students). See the Fairfax County Public Schools district page for the complete list.
Related tools
Every figure on PlainSchools is rendered directly from the source NCES, CRDC and F-33 federal records, no number is typed in by an editor. Each school's figures reflect its most recent NCES/CRDC submission on file. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of June 2026.