Enrollment
1,629
Virginia · 2024-25 NCES data
High school (grades 9-12) · Ashburn, VA
Stone Bridge High
Federal NCES profile for Stone Bridge High, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 60/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 510225002538
👥 S:T ratio 50
📚 AP courses 100
🌟 Gifted program 30
🎓 Counselors 59
📋 Attendance 60
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Stone Bridge High earns 60/100 on the Resource Investment Index, with class sizes smaller than 73% of Virginia schools.
- #1 of 4
- high schools in Ashburn · Resource Index
- 60
- Resource Index · Higher
- 12.4:1
- small classes for Virginia
- 13.5%
- free-lunch eligible
Stone Bridge High has class sizes smaller than 73% of Virginia schools. Computed live against every Virginia school reporting to NCES.
By Resource Investment Index, Stone Bridge High ranks #1 of 4 high schools in Ashburn, VA.
School address
District: Loudoun County Public Schools · Virginia
NCES ID 510225002538 Verify on NCES CCD record →
Teachers (FTE)
131.0
Federal CCD staff survey
Students per teacher
12.4:1
vs 13.9:1 Virginia avg
-11% vs state
Free-lunch eligible
13.5%
vs 57.6% Virginia avg
-77% vs state
Student-teacher ratio in context
How Stone Bridge High compares with Virginia and U.S. medians
What stands out at Stone Bridge High
Stone Bridge High is a lower-poverty, large high school in Ashburn, Virginia, enrolling 1,629 students.
Class sizes run a bit leaner than typical: 12.4:1 puts it in the smaller third of Virginia schools by student-teacher ratio.
Comparatively few students face economic hardship here, 13.5% free-meal eligibility runs 77% below the Virginia average.
By headcount it is one of the larger campuses in Virginia, bigger than 94% of state schools at 1,629 students.
Its Resource Investment Index sits near the middle of the pack among 1,868 scored Virginia schools.
Against 91 statewide peers matched on enrollment and economic need, it ranks mid-pack at #55.
Its student body is led by White (49%) and Asian (21%) (diversity index 68/100).
On the academic-pipeline side it reports 24 Advanced Placement courses.
Counselor coverage is strong, about 204 students per counselor, inside the American School Counselor Association's recommended 250:1.
16.0% of students were chronically absent in the 2021-22 collection, in line with the post-pandemic national range.
The surrounding Loudoun County Public Schools spends $18,953 per pupil, 29% above the Virginia average, a better-resourced district than most.
Among Ashburn's high schools, it stands alongside Independence High (2,166 students): Stone Bridge High is smaller than that campus by headcount and runs leaner classes (12.4:1 vs 16:1).
Loudoun County Public Schools also operates Independence High (2,166 students) and Lightridge High (2,030 students) alongside Stone Bridge High.
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 Stone Bridge High compares
Stone Bridge High on the metrics families compare, against Virginia and U.S. means.
| Metric | This school | vs Virginia | Virginia avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 12.4:1 | ▼ 11% | 13.9:1 | 15.7:1 |
| Free-lunch eligible | 13.5% | ▼ 77% | 57.6% | 51.7% |
| Enrollment | 1,629 | top 6% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
12.4:1
Leaner classes than 72% of US schools, among the more generously staffed nationally.
1,629
Bigger than 97% of US schools by enrollment, a large campus nationally.
Equity indicators (what these measure)
Economic need
13.5%
free-lunch eligible
- 77% 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
12.4:1
students per teacher
- 11% below state mean
Top 27% in Virginia - lower ratio than 73% of state schools
Well under the widely cited 15:1 individualized-attention benchmark, among the leaner class loads nationally.
Engagement
16.0%
chronically absent (missed 10%+ of school days)
In the 15-20% range, nearing the "high" absenteeism threshold.
Funding equity
$18,953
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
Counselors8.0 FTE
Per 204 students, the combined health-and-guidance staffing load for this school.
Discipline context
45
in-school suspensions + 19 out-of-school
Suspension rate: 2.8 per 100 students. Combined in-school and out-of-school rate: 3.9 per 100 students. Reported via the Civil Rights Data Collection.
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
White 48.9%
Asian 21.2%
Hispanic or Latino 14.7%
African American 7.9%
Two or More 6.7%
American Indian / Alaska Native 0.5%
Native Hawaiian / Pacific Islander 0.2%
Largest group: White at 48.9% of enrollment.
Student-body diversity index 68.4/100
Simpson diversity index - at 68.4, Stone Bridge High is more mixed than the Virginia school average of 53.7.
Programs
AP courses offered 24
Funding & spending
District-wide per-pupil expenditure for Loudoun County Public Schools, which includes Stone Bridge High.
$18,953
Per student
+29%
vs Virginia
Avg $14,649
+14%
vs U.S.
Avg $16,593
Revenue mix
Local 67.9%
State 27.1%
Federal 5.0%
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 Stone Bridge High Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Independence High | Larger | Similar economic need | Higher S:T ratio |
| Lightridge High | Similar size | Similar economic need | Higher S:T ratio |
| Freedom High | Similar size | Similar economic need | Similar S:T ratio |
| Briar Woods High | Similar size | Similar economic need | Higher S:T ratio |
| John Champe High | Similar size | Similar economic need | Higher S:T ratio |
Comparisons are relative to Stone Bridge High's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 2,166
- Students per teacher
- 16:1
- Resource Index
- 46/100
- Enrollment
- 2,030
- Students per teacher
- 16.5:1
- Resource Index
- 45/100
- Enrollment
- 1,885
- Students per teacher
- 13:1
- Resource Index
- 51/100
- Enrollment
- 1,862
- Students per teacher
- 14.8:1
- Resource Index
- 45/100
- Enrollment
- 1,851
- Students per teacher
- 14.7:1
- Resource Index
- 47/100
Similar high schools in Ashburn
3 comparable high schools (grades 9-12) serving the same city.
Similar high 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 (~1,629 students)
Similar student-teacher ratio (~12.4:1)
Next steps
Verify locally before acting on Stone Bridge High's federal record.
- Compare Stone Bridge High against another school. Compare schools
- Loudoun 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 Stone Bridge High
How many students attend Stone Bridge High?
Stone Bridge High has 1,629 students enrolled. It is a high school in Ashburn, VA.
What is the student-teacher ratio at Stone Bridge High?
The student-teacher ratio at Stone Bridge High is 12.4:1, which is 11% lower than the Virginia average of 13.9:1 and 21% lower than the national average of 15.7:1. Lower ratios generally mean more individual attention per student.
What percentage of students receive free lunch at Stone Bridge High?
13.5% of students at Stone Bridge High are eligible for free lunch, compared to the Virginia average of 57.6%.
What is the racial and ethnic makeup of Stone Bridge High?
The largest demographic group at Stone Bridge High is White at 48.9% of enrollment, in Ashburn, VA. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 68.4/100.
What is the Resource Investment Index for Stone Bridge High?
Stone Bridge High has a Resource Investment Index of 60/100 (higher reported resources relative to schools nationally) based on 5 factors: student-teacher ratio, AP course offerings, counselor availability, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Stone Bridge High rank among high schools in Ashburn?
By Resource Investment Index, Stone Bridge High ranks #1 of 4 high schools in Ashburn, VA. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all high schools in Ashburn on the city page.
Is Stone Bridge High a good school?
Stone Bridge High earns 60/100 on the Resource Investment Index, with class sizes smaller than 73% of Virginia schools. 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 Loudoun County Public Schools?
Besides Stone Bridge High, Loudoun County Public Schools also operates Independence High (2,166 students), Lightridge High (2,030 students), and Freedom High (1,885 students). See the Loudoun 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.