Enrollment
2,457
Texas · 2024-25 NCES data
High school (grades 9-12) · Arlington, TX
Lamar H S
Federal NCES profile for Lamar H S, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 65/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 480870000253
👥 S:T ratio 40
📚 AP courses 100
🌟 Gifted program 70
🎓 Counselors 50
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Lamar H S earns 65/100 on the Resource Investment Index, with class sizes near the Texas median. It is also one of the largest schools in Texas.
- #2 of 13
- high schools in Arlington · Resource Index
- 65
- Resource Index · Higher
- 14.9:1
- students per teacher
- 69.2%
- free-lunch eligible
Lamar H S has class sizes near the Texas median. Computed live against every Texas school reporting to NCES.
By Resource Investment Index, Lamar H S ranks #2 of 13 high schools in Arlington, TX.
School address
District: Arlington Isd · Texas
NCES ID 480870000253 Verify on NCES CCD record →
Teachers (FTE)
165.0
Federal CCD staff survey
Students per teacher
14.9:1
vs 14.7:1 Texas avg
+1% vs state
Free-lunch eligible
69.2%
vs 61.9% Texas avg
+12% vs state
Student-teacher ratio in context
How Lamar H S compares with Texas and U.S. medians
What stands out at Lamar H S
Lamar H S is a higher-need, large high school in Arlington, Texas, enrolling 2,457 students.
At 14.9:1, its student-teacher ratio sits close to the Texas median, within a few percentage points of the 14.7:1 state norm, neither notably crowded nor notably small.
Its free-meal eligibility rate of 69.2% lands close to the Texas typical range, neither a high- nor low-need campus by this measure.
By headcount it is one of the larger campuses in Texas, bigger than 98% of state schools at 2,457 students.
Its Resource Investment Index lands in the upper third of 8,960 scored Texas schools.
Among 176 similarly sized, similarly resourced-need Texas schools statewide, it ranks #15, a top-tier result once campus size and economic need are matched.
Its student body is led by Hispanic or Latino (49%) and African American (33%) (diversity index 64/100).
On the academic-pipeline side it reports 25 Advanced Placement courses.
Counselor coverage is strong, about 248 students per counselor, inside the American School Counselor Association's recommended 250:1.
Its district draws 19.1% of revenue from federal sources, an above-typical federal share that tends to track a higher-need student population.
The federal civil-rights collection also records 26 expulsions at this campus for 2021-22.
Arlington Isd also operates Martin H S (3,535 students) and Sam Houston H S (3,208 students) alongside Lamar 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 Lamar H S compares
Lamar 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 | 14.9:1 | ▲ 1% | 14.7:1 | 15.7:1 |
| Free-lunch eligible | 69.2% | ▲ 12% | 61.9% | 51.7% |
| Enrollment | 2,457 | top 2% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
14.9:1
Leaner classes than 48% of US schools, a middle-of-the-pack class size.
2,457
Bigger than 99% of US schools by enrollment, a large campus nationally.
Equity indicators (what these measure)
Economic need
69.2%
free-lunch eligible
- 12% above the Texas average of 61.9%
Above the 40% Title I schoolwide threshold; federal funds support the whole school, not individual students.
Staffing depth
14.9:1
students per teacher
- 1% above state mean
Top 58% in Texas - lower ratio than 42% of state schools
Close to the 15:1 benchmark most often cited for individualized attention.
Funding equity
$11,489
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
Counselors9.9 FTE
Per 248 students, the combined health-and-guidance staffing load for this school.
Discipline context
233
in-school suspensions + 250 out-of-school
Suspension rate: 9.5 per 100 students. Combined in-school and out-of-school rate: 19.7 per 100 students. Reported via the Civil Rights Data Collection. Includes 26 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 48.6%
African American 33.4%
White 12.1%
Two or More 3.5%
Asian 1.9%
American Indian / Alaska Native 0.4%
Native Hawaiian / Pacific Islander 0.2%
Largest group: Hispanic or Latino at 48.6% of enrollment.
Student-body diversity index 63.6/100
Simpson diversity index - at 63.6, Lamar 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 Arlington Isd, which includes Lamar H S.
$11,489
Per student
-16%
vs Texas
Avg $13,644
-31%
vs U.S.
Avg $16,593
Revenue mix
Local 57.0%
State 23.9%
Federal 19.1%
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 Lamar H S Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Martin H S | Larger | Lower economic need | Higher S:T ratio |
| Sam Houston H S | Larger | Higher economic need | Similar S:T ratio |
| Arlington H S | Similar size | Similar economic need | Similar S:T ratio |
| Bowie H S | Similar size | Lower economic need | Similar S:T ratio |
| Seguin H S | Smaller | Similar economic need | Lower S:T ratio |
Comparisons are relative to Lamar H S's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 3,535
- Students per teacher
- 17.1:1
- Resource Index
- 46/100
- Enrollment
- 3,208
- Students per teacher
- 15.5:1
- Resource Index
- 52/100
- Enrollment
- 2,580
- Students per teacher
- 15.9:1
- Resource Index
- 50/100
- Enrollment
- 2,140
- Students per teacher
- 13.7:1
- Resource Index
- 42/100
- Enrollment
- 1,554
- Students per teacher
- 13.4:1
- Resource Index
- 46/100
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 (~2,457 students)
Similar student-teacher ratio (~14.9:1)
Next steps
Verify locally before acting on Lamar H S's federal record.
- Compare Lamar H S against another school. Compare schools
- Arlington 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 Lamar H S
How many students attend Lamar H S?
Lamar H S has 2,457 students enrolled. It is a high school in Arlington, TX.
What is the student-teacher ratio at Lamar H S?
The student-teacher ratio at Lamar H S is 14.9:1, which is 1% higher than the Texas average of 14.7:1 and 5% lower than the national average of 15.7:1.
What percentage of students receive free lunch at Lamar H S?
69.2% of students at Lamar H S are eligible for free lunch, compared to the Texas average of 61.9%.
What is the racial and ethnic makeup of Lamar H S?
The largest demographic group at Lamar H S is Hispanic or Latino at 48.6% of enrollment, in Arlington, TX. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 63.6/100.
What is the Resource Investment Index for Lamar H S?
Lamar H S has a Resource Investment Index of 65/100 (higher reported resources relative to schools nationally) based on 4 factors: student-teacher ratio, AP course offerings, counselor availability. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Lamar H S rank among high schools in Arlington?
By Resource Investment Index, Lamar H S ranks #2 of 13 high schools in Arlington, 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 Arlington on the city page.
Is Lamar H S a good school?
Lamar H S earns 65/100 on the Resource Investment Index, with class sizes near the Texas median. 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 Arlington Isd?
Besides Lamar H S, Arlington Isd also operates Martin H S (3,535 students), Sam Houston H S (3,208 students), and Arlington H S (2,580 students). See the Arlington 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.