Enrollment
2,965
Texas · 2024-25 NCES data
High school (grades 9-12) · San Antonio, TX
Brennan H S
Federal NCES profile for Brennan H S, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 46/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 483312012347
👥 S:T ratio 32
📚 AP courses 100
🌟 Gifted program 70
🎓 Counselors 1
📋 Attendance 25
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Brennan H S earns 46/100 on the Resource Investment Index, with class sizes larger than 79% of Texas schools. It is also one of the largest schools in Texas.
- #67 of 79
- high schools in San Antonio · Resource Index
- 46
- Resource Index · Typical
- 16.9:1
- large classes for Texas
- 31.2%
- free-lunch eligible
Brennan H S has class sizes larger than 79% of Texas schools. Computed live against every Texas school reporting to NCES.
By Resource Investment Index, Brennan H S ranks #67 of 79 high schools in San Antonio, TX.
School address
District: Northside Isd · Texas
NCES ID 483312012347 Verify on NCES CCD record →
Teachers (FTE)
175.0
Federal CCD staff survey
Students per teacher
16.9:1
vs 14.7:1 Texas avg
+15% vs state
Free-lunch eligible
31.2%
vs 61.9% Texas avg
-50% vs state
Student-teacher ratio in context
How Brennan H S compares with Texas and U.S. medians
What stands out at Brennan H S
Brennan H S is a large high school in San Antonio, Texas, enrolling 2,965 students.
Class loads run somewhat heavier than typical: 16.9:1 puts it in the larger third of Texas schools by student-teacher ratio.
Comparatively few students face economic hardship here, 31.2% free-meal eligibility runs 50% below the Texas average.
By headcount it is one of the larger campuses in Texas, bigger than 99% of state schools at 2,965 students.
Its Resource Investment Index lands in the lower third of 8,960 scored Texas schools.
Among 134 similarly sized, similarly resourced-need Texas schools statewide, it ranks #114, in the lower tier once campus size and economic need are matched.
Its student body is led by Hispanic or Latino (63%) and White (15%) (diversity index 56/100).
On the academic-pipeline side it reports 25 Advanced Placement courses.
Counselor access is stretched at roughly 494 students per counselor, well above the ASCA-recommended 250:1 ceiling.
Chronic absenteeism is elevated: 30.2% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
The surrounding Northside Isd spends $10,615 per pupil, 22% below the Texas average, a leaner-resourced district than most.
Its district draws 17.6% of revenue from federal sources, an above-typical federal share that tends to track a higher-need student population.
Discipline events run high: 634 in- and out-of-school suspensions were reported for 2,965 students in the 2021-22 Civil Rights Data Collection.
The federal civil-rights collection also records 4 expulsions at this campus for 2021-22.
Northside Isd also operates Harlan H S (2,778 students) and Clark H S (2,750 students) alongside Brennan H S.
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 Brennan H S compares
Brennan H S on the metrics families compare, against Texas and U.S. means.
| Metric | This school | vs Texas | Texas avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 16.9:1 | ▲ 15% | 14.7:1 | 15.7:1 |
| Free-lunch eligible | 31.2% | ▼ 50% | 61.9% | 51.7% |
| Enrollment | 2,965 | top 1% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
16.9:1
Leaner classes than 31% of US schools, heavier class loads than most.
2,965
Bigger than 99% of US schools by enrollment, a large campus nationally.
Equity indicators (what these measure)
Economic need
31.2%
free-lunch eligible
- 50% below the Texas average of 61.9%
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
16.9:1
students per teacher
- 15% above state mean
Top 79% in Texas - lower ratio than 21% of state schools
Between 16:1 and 20:1, squarely in the typical U.S. public-school staffing range.
Engagement
30.2%
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
$10,615
per pupil, district-wide
- below Texas avg of $13,644
Well below the U.S. average per-pupil spend, a notably leaner funding position that may affect programs, facilities, and staffing.
Support staff
Counselors6.0 FTE
Per 494 students, the combined health-and-guidance staffing load for this school.
Discipline context
399
in-school suspensions + 235 out-of-school
Suspension rate: 13.5 per 100 students. Combined in-school and out-of-school rate: 21.4 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
Hispanic or Latino 62.8%
White 15.2%
African American 13.7%
Two or More 5.2%
Asian 2.8%
Native Hawaiian / Pacific Islander 0.3%
Largest group: Hispanic or Latino at 62.8% of enrollment.
Student-body diversity index 56.0/100
Simpson diversity index - at 56.0, Brennan H S is more mixed than the Texas school average of 44.7.
Programs
AP courses offered 25
Gifted & talented Yes
Funding & spending
District-wide per-pupil expenditure for Northside Isd, which includes Brennan H S.
$10,615
Per student
-22%
vs Texas
Avg $13,644
-36%
vs U.S.
Avg $16,593
Revenue mix
Local 60.8%
State 21.6%
Federal 17.6%
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 Brennan H S Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Harlan H S | Similar size | Similar economic need | Higher S:T ratio |
| Clark H S | Similar size | Similar economic need | Similar S:T ratio |
| Taft H S | Similar size | Similar economic need | Similar S:T ratio |
| Brandeis H S | Similar size | Similar economic need | Similar S:T ratio |
| Marshall H S | Similar size | Higher economic need | Similar S:T ratio |
Comparisons are relative to Brennan H S's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 2,778
- Students per teacher
- 18.9:1
- Resource Index
- 38/100
- Enrollment
- 2,750
- Students per teacher
- 16.9:1
- Resource Index
- 37/100
- Enrollment
- 2,670
- Students per teacher
- 16.6:1
- Resource Index
- 43/100
- Enrollment
- 2,657
- Students per teacher
- 16.8:1
- Resource Index
- 41/100
- Enrollment
- 2,634
- Students per teacher
- 16.4:1
- Resource Index
- 43/100
Similar high schools statewide
Matched by enrollment size and by staffing ratio across all of Texas, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~2,965 students)
Similar student-teacher ratio (~16.9:1)
Next steps
Verify locally before acting on Brennan H S's federal record.
- Compare Brennan H S against another school. Compare schools
- Northside Isd'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 Brennan H S
How many students attend Brennan H S?
Brennan H S has 2,965 students enrolled. It is a high school in San Antonio, TX.
What is the student-teacher ratio at Brennan H S?
The student-teacher ratio at Brennan H S is 16.9:1, which is 15% higher than the Texas average of 14.7:1 and 8% higher than the national average of 15.7:1.
What percentage of students receive free lunch at Brennan H S?
31.2% of students at Brennan H S are eligible for free lunch, compared to the Texas average of 61.9%.
What is the racial and ethnic makeup of Brennan H S?
The largest demographic group at Brennan H S is Hispanic or Latino at 62.8% of enrollment, in San Antonio, TX. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 56.0/100.
What is the Resource Investment Index for Brennan H S?
Brennan H S has a Resource Investment Index of 46/100 (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 Brennan H S rank among high schools in San Antonio?
By Resource Investment Index, Brennan H S ranks #67 of 79 high schools in San Antonio, TX. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all high schools in San Antonio on the city page.
Is Brennan H S a good school?
Brennan H S earns 46/100 on the Resource Investment Index, with class sizes larger than 79% of Texas schools. It is also one of the largest schools in Texas. 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 Northside Isd?
Besides Brennan H S, Northside Isd also operates Harlan H S (2,778 students), Clark H S (2,750 students), and Taft H S (2,670 students). See the Northside Isd 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.