Enrollment
994
Delaware · 2024-25 NCES data
High school (grades 9-12) · Wilmington, DE
Concord High School
Federal NCES profile for Concord High School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 47/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 100124000247
👥 S:T ratio 46
📚 AP courses 95
🌟 Gifted program 30
🎓 Counselors 50
📋 Attendance 12
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Concord High School earns 47/100 on the Resource Investment Index, with class sizes near the Delaware median.
- #4 of 9
- high schools in Wilmington · Resource Index
- 47
- Resource Index · Typical
- 13.6:1
- students per teacher
- 994
- students enrolled
Concord High School has class sizes near the Delaware median. Computed live against every Delaware school reporting to NCES.
By Resource Investment Index, Concord High School ranks #4 of 9 high schools in Wilmington, DE.
School address
District: Brandywine School District · Delaware
NCES ID 100124000247 Verify on NCES CCD record →
Teachers (FTE)
73.0
Federal CCD staff survey
Students per teacher
13.6:1
vs 13.9:1 Delaware avg
-2% vs state
Student-teacher ratio in context
How Concord High School compares with Delaware and U.S. medians
What stands out at Concord High School
Concord High School is a large high school in Wilmington, Delaware, enrolling 994 students.
At 13.6:1, its student-teacher ratio sits close to the Delaware median, within a few percentage points of the 13.9:1 state norm, neither notably crowded nor notably small.
Enrollment of 994 puts it in the larger third of Delaware schools by headcount.
Its Resource Investment Index lands in the lower third of 222 scored Delaware schools.
Its student body is led by White (47%) and African American (35%) (diversity index 65/100).
On the academic-pipeline side it reports 19 Advanced Placement courses.
Counselor coverage is strong, about 249 students per counselor, inside the American School Counselor Association's recommended 250:1.
Chronic absenteeism is elevated: 35.1% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
Among Wilmington's high schools, it stands alongside Delcastle Technical High School (1,605 students): Concord High School is smaller than that campus by headcount and runs heavier classes (13.6:1 vs 12.5:1).
Brandywine School District also operates Mount Pleasant High School (1,084 students) and Claymont Elementary School (937 students) alongside Concord High School.
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 Concord High School compares
Concord High School on the metrics families compare, against Delaware and U.S. means.
| Metric | This school | vs Delaware | Delaware avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 13.6:1 | ▼ 2% | 13.9:1 | 15.7:1 |
| Enrollment | 994 | top 13% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
13.6:1
Leaner classes than 61% of US schools, a middle-of-the-pack class size.
994
Bigger than 91% of US schools by enrollment, a large campus nationally.
Equity indicators (what these measure)
Staffing depth
13.6:1
students per teacher
- 2% below state mean
Top 48% in Delaware - lower ratio than 52% of state schools
Close to the 15:1 benchmark most often cited for individualized attention.
Engagement
35.1%
chronically absent (missed 10%+ of school days)
At or above 20%, the commonly used threshold for "high" chronic absenteeism, signaling significant barriers to regular attendance.
Funding equity
$20,248
per pupil, district-wide
- above Delaware avg of $16,990
Well above the U.S. public-school average, reflecting substantially higher local or state investment per enrolled student.
Support staff
Counselors4.0 FTE
Per 249 students, the combined health-and-guidance staffing load for this school.
Discipline context
38
in-school suspensions + 48 out-of-school
Suspension rate: 3.8 per 100 students. Combined in-school and out-of-school rate: 8.7 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 46.5%
African American 35.0%
Asian 8.4%
Hispanic or Latino 7.3%
Two or More 2.0%
American Indian / Alaska Native 0.8%
Largest group: White at 46.5% of enrollment.
Student-body diversity index 64.8/100
Simpson diversity index - at 64.8, Concord High School is more mixed than the Delaware school average of 61.3.
Programs
AP courses offered 19
Funding & spending
District-wide per-pupil expenditure for Brandywine School District, which includes Concord High School.
$20,248
Per student
+19%
vs Delaware
Avg $16,990
+22%
vs U.S.
Avg $16,593
Revenue mix
Local 41.5%
State 45.9%
Federal 12.6%
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 Concord High School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Mount Pleasant High School | Similar size | No free-lunch data | Similar S:T ratio |
| Claymont Elementary School | Similar size | No free-lunch data | Higher S:T ratio |
| Talley Middle School | Similar size | No free-lunch data | Similar S:T ratio |
| Brandywine High School | Similar size | No free-lunch data | Similar S:T ratio |
| Springer Middle School | Similar size | No free-lunch data | Similar S:T ratio |
Comparisons are relative to Concord High School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,084
- Students per teacher
- 14.1:1
- Resource Index
- 35/100
- Enrollment
- 937
- Students per teacher
- 15.6:1
- Resource Index
- 39/100
- Enrollment
- 900
- Students per teacher
- 14.1:1
- Resource Index
- 38/100
- Enrollment
- 897
- Students per teacher
- 13:1
- Resource Index
- 33/100
- Enrollment
- 776
- Students per teacher
- 13.4:1
- Resource Index
- 38/100
Similar high schools in Wilmington
6 comparable high schools (grades 9-12) serving the same city.
Delcastle Technical High School
Vocational / career-technical school
1,605 students 12.5:1 students per teacher
Mount Pleasant High School
Standard public school
1,084 students 14.1:1 students per teacher
Charter School of Wilmington
Standard public school
977 students 19.2:1 students per teacher
Mckean (Thomas) High School
Standard public school
920 students 13:1 students per teacher
Howard High School of Technology
Vocational / career-technical school
905 students 13.7:1 students per teacher
Brandywine High School
Standard public school
897 students 13:1 students per teacher
Similar high schools statewide
Matched by enrollment size and by staffing ratio across all of Delaware, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~994 students)
Similar student-teacher ratio (~13.6:1)
Next steps
Verify locally before acting on Concord High School's federal record.
- Compare Concord High School against another school. Compare schools
- Brandywine School District'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 Concord High School
How many students attend Concord High School?
Concord High School has 994 students enrolled. It is a high school in Wilmington, DE.
What is the student-teacher ratio at Concord High School?
The student-teacher ratio at Concord High School is 13.6:1, which is 2% lower than the Delaware average of 13.9:1 and 13% lower than the national average of 15.7:1. Lower ratios generally mean more individual attention per student.
What is the racial and ethnic makeup of Concord High School?
The largest demographic group at Concord High School is White at 46.5% of enrollment, in Wilmington, DE. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 64.8/100.
What is the Resource Investment Index for Concord High School?
Concord High School has a Resource Investment Index of 47/100 (typical 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 Concord High School rank among high schools in Wilmington?
By Resource Investment Index, Concord High School ranks #4 of 9 high schools in Wilmington, DE. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all high schools in Wilmington on the city page.
Is Concord High School a good school?
Concord High School earns 47/100 on the Resource Investment Index, with class sizes near the Delaware 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 Brandywine School District?
Besides Concord High School, Brandywine School District also operates Mount Pleasant High School (1,084 students), Claymont Elementary School (937 students), and Talley Middle School (900 students). See the Brandywine School District 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.