Enrollment
1,386
Pennsylvania · 2024-25 NCES data
High school (grades 9-12) · Pittsburgh, PA
Pittsburgh Allderdice Hs
Federal NCES profile for Pittsburgh Allderdice Hs, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 50/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 421917000409
👥 S:T ratio 47
📚 AP courses 100
🌟 Gifted program 70
🎓 Counselors 31
📋 Attendance 0
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Pittsburgh Allderdice Hs earns 50/100 on the Resource Investment Index, with class sizes near the Pennsylvania median. It is also one of the largest schools in Pennsylvania.
- #14 of 16
- high schools in Pittsburgh · Resource Index
- 50
- Resource Index · Higher
- 13.3:1
- students per teacher
- 100.0%
- free-lunch eligible
Pittsburgh Allderdice Hs has class sizes near the Pennsylvania median. Computed live against every Pennsylvania school reporting to NCES.
By Resource Investment Index, Pittsburgh Allderdice Hs ranks #14 of 16 high schools in Pittsburgh, PA.
School address
District: Pittsburgh Sd · Pennsylvania
NCES ID 421917000409 Verify on NCES CCD record →
Teachers (FTE)
104.0
Federal CCD staff survey
Students per teacher
13.3:1
vs 13.6:1 Pennsylvania avg
-2% vs state
Free-lunch eligible
100.0%
vs 58.1% Pennsylvania avg
+72% vs state
Student-teacher ratio in context
How Pittsburgh Allderdice Hs compares with Pennsylvania and U.S. medians
What stands out at Pittsburgh Allderdice Hs
Pittsburgh Allderdice Hs is a high-poverty, large high school in Pittsburgh, Pennsylvania, enrolling 1,386 students.
At 13.3:1, its student-teacher ratio sits close to the Pennsylvania median, within a few percentage points of the 13.6:1 state norm, neither notably crowded nor notably small.
Economic need runs somewhat above the state's typical profile, with 100.0% of students eligible for free meals.
By headcount it is one of the larger campuses in Pennsylvania, bigger than 96% of state schools at 1,386 students.
Its Resource Investment Index lands in the lower third of 2,889 scored Pennsylvania schools.
Against 114 statewide peers matched on enrollment and economic need, it ranks mid-pack at #52.
Its student body is led by White (47%) and African American (31%), more mixed than most schools in the state (diversity index 66/100).
On the academic-pipeline side it reports 23 Advanced Placement courses.
Counselor availability sits well past the ASCA benchmark, roughly 347 students sharing each counselor, though short of the most stretched campuses.
Chronic absenteeism is elevated: 45.4% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
The surrounding Pittsburgh Sd spends $24,314 per pupil, 35% above the Pennsylvania average, a better-resourced district than most.
The federal civil-rights collection also records 4 expulsions at this campus for 2021-22.
Among Pittsburgh's high schools, it stands alongside Mt Lebanon Shs (1,772 students): Pittsburgh Allderdice Hs is smaller than that campus by headcount and runs leaner classes (13.3:1 vs 14.1:1).
Pittsburgh Sd also operates Pittsburgh Brashear Hs (897 students) and Pittsburgh Capa 6-12 (840 students) alongside Pittsburgh Allderdice Hs.
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 Pittsburgh Allderdice Hs compares
Pittsburgh Allderdice Hs on the metrics families compare, against Pennsylvania and U.S. means.
| Metric | This school | vs Pennsylvania | Pennsylvania avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 13.3:1 | ▼ 2% | 13.6:1 | 15.7:1 |
| Free-lunch eligible | 100.0% | ▲ 72% | 58.1% | 51.7% |
| Enrollment | 1,386 | top 4% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
13.3:1
Leaner classes than 64% of US schools, a middle-of-the-pack class size.
1,386
Bigger than 95% of US schools by enrollment, a large campus nationally.
Equity indicators (what these measure)
Economic need
100.0%
free-lunch eligible
- 72% above the Pennsylvania average of 58.1%
Above the 40% Title I schoolwide threshold; federal funds support the whole school, not individual students.
Staffing depth
13.3:1
students per teacher
- 2% below state mean
Top 49% in Pennsylvania - lower ratio than 51% of state schools
Close to the 15:1 benchmark most often cited for individualized attention.
Engagement
45.4%
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
$24,314
per pupil, district-wide
- above Pennsylvania avg of $17,970
Well above the U.S. public-school average, reflecting substantially higher local or state investment per enrolled student.
Support staff
Counselors4.0 FTE
Per 347 students, the combined health-and-guidance staffing load for this school.
Discipline context
0
in-school suspensions + 206 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 14.9 per 100 students. Reported via the Civil Rights Data Collection. Includes 4 expulsions.
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 47.2%
African American 31.4%
Two or More 8.2%
Hispanic or Latino 7.9%
Asian 4.7%
Native Hawaiian / Pacific Islander 0.4%
American Indian / Alaska Native 0.2%
Largest group: White at 47.2% of enrollment.
Student-body diversity index 66.3/100
Simpson diversity index - at 66.3, Pittsburgh Allderdice Hs is more mixed than the Pennsylvania school average of 37.3.
Programs
AP courses offered 23
Gifted & talented Yes
Funding & spending
District-wide per-pupil expenditure for Pittsburgh Sd, which includes Pittsburgh Allderdice Hs.
$24,314
Per student
+35%
vs Pennsylvania
Avg $17,970
+47%
vs U.S.
Avg $16,593
Revenue mix
Local 51.7%
State 38.2%
Federal 10.2%
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 Pittsburgh Allderdice Hs Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Pittsburgh Brashear Hs | Smaller | Similar economic need | Lower S:T ratio |
| Pittsburgh Capa 6-12 | Smaller | Similar economic need | Higher S:T ratio |
| Pittsburgh Colfax K-8 | Smaller | Similar economic need | Similar S:T ratio |
| Pittsburgh Obama 6-12 | Smaller | Similar economic need | Lower S:T ratio |
| Pittsburgh Science and Technology Academ | Smaller | Similar economic need | Higher S:T ratio |
Comparisons are relative to Pittsburgh Allderdice Hs's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 897
- Students per teacher
- 9.8:1
- Resource Index
- 50/100
- Enrollment
- 840
- Students per teacher
- 17.1:1
- Resource Index
- 42/100
- Enrollment
- 789
- Students per teacher
- 14.6:1
- Resource Index
- 41/100
- Enrollment
- 678
- Students per teacher
- 11.5:1
- Resource Index
- 48/100
- Enrollment
- 618
- Students per teacher
- 16.7:1
- Resource Index
- 48/100
Similar high schools in Pittsburgh
6 comparable high schools (grades 9-12) serving the same city.
Mt Lebanon Shs
Standard public school
1,772 students 14.1:1 students per teacher
North Hills Shs
Standard public school
1,443 students 14.1:1 students per teacher
Fox Chapel Area Hs
Standard public school
1,360 students 14.5:1 students per teacher
Upper Saint Clair Hs
Standard public school
1,269 students 13.8:1 students per teacher
Shaler Area Hs
Standard public school
1,160 students 11.3:1 students per teacher
Penn Hills Shs
Standard public school
1,049 students 16.9:1 students per teacher
Similar high schools statewide
Matched by enrollment size and by staffing ratio across all of Pennsylvania, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~1,386 students)
Similar student-teacher ratio (~13.3:1)
Next steps
Verify locally before acting on Pittsburgh Allderdice Hs's federal record.
- Compare Pittsburgh Allderdice Hs against another school. Compare schools
- Pittsburgh Sd'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 Pittsburgh Allderdice Hs
How many students attend Pittsburgh Allderdice Hs?
Pittsburgh Allderdice Hs has 1,386 students enrolled. It is a high school in Pittsburgh, PA.
What is the student-teacher ratio at Pittsburgh Allderdice Hs?
The student-teacher ratio at Pittsburgh Allderdice Hs is 13.3:1, which is 2% lower than the Pennsylvania average of 13.6:1 and 15% 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 Pittsburgh Allderdice Hs?
100.0% of students at Pittsburgh Allderdice Hs are eligible for free lunch, compared to the Pennsylvania average of 58.1%.
What is the racial and ethnic makeup of Pittsburgh Allderdice Hs?
The largest demographic group at Pittsburgh Allderdice Hs is White at 47.2% of enrollment, in Pittsburgh, PA. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 66.3/100.
What is the Resource Investment Index for Pittsburgh Allderdice Hs?
Pittsburgh Allderdice Hs has a Resource Investment Index of 50/100 (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 Pittsburgh Allderdice Hs rank among high schools in Pittsburgh?
By Resource Investment Index, Pittsburgh Allderdice Hs ranks #14 of 16 high schools in Pittsburgh, PA. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all high schools in Pittsburgh on the city page.
Is Pittsburgh Allderdice Hs a good school?
Pittsburgh Allderdice Hs earns 50/100 on the Resource Investment Index, with class sizes near the Pennsylvania median. It is also one of the largest schools in Pennsylvania. 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 Pittsburgh Sd?
Besides Pittsburgh Allderdice Hs, Pittsburgh Sd also operates Pittsburgh Brashear Hs (897 students), Pittsburgh Capa 6-12 (840 students), and Pittsburgh Colfax K-8 (789 students). See the Pittsburgh Sd 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.