Enrollment
1,654
Louisiana · 2024-25 NCES data
High school (grades 9-12) · Slidell, LA
Slidell High School
Federal NCES profile for Slidell High School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 35/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 220165001294
👥 S:T ratio 29
📚 AP courses 10
🌟 Gifted program 70
🎓 Counselors 17
📋 Attendance 51
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Slidell High School earns 35/100 on the Resource Investment Index, with class sizes near the Louisiana median. It is also one of the largest schools in Louisiana.
- #3 of 3
- high schools in Slidell · Resource Index
- 35
- Resource Index · Typical
- 17.8:1
- students per teacher
- 45.0%
- free-lunch eligible
Slidell High School has class sizes near the Louisiana median. Computed live against every Louisiana school reporting to NCES.
By Resource Investment Index, Slidell High School ranks #3 of 3 high schools in Slidell, LA.
School address
District: St. Tammany Parish · Louisiana
NCES ID 220165001294 Verify on NCES CCD record →
Teachers (FTE)
93.0
Federal CCD staff survey
Students per teacher
17.8:1
vs 16.8:1 Louisiana avg
+6% vs state
Free-lunch eligible
45.0%
vs 62.5% Louisiana avg
-28% vs state
Student-teacher ratio in context
How Slidell High School compares with Louisiana and U.S. medians
What stands out at Slidell High School
Slidell High School is a large high school in Slidell, Louisiana, enrolling 1,654 students.
Class loads run somewhat heavier than typical: 17.8:1 puts it in the larger third of Louisiana schools by student-teacher ratio.
Economic need runs somewhat below the state's typical profile, with 45.0% of students eligible for free meals.
By headcount it is one of the larger campuses in Louisiana, bigger than 98% of state schools at 1,654 students.
Its Resource Investment Index lands in the lower third of 1,330 scored Louisiana schools.
Against 56 statewide peers matched on enrollment and economic need, it ranks mid-pack at #30.
Its student body is led by White (45%) and African American (37%), more mixed than most schools in the state (diversity index 65/100).
On the academic-pipeline side it reports 2 Advanced Placement courses.
Counselor access is stretched at roughly 414 students per counselor, well above the ASCA-recommended 250:1 ceiling.
Attendance runs somewhat below the norm, with 19.6% of students chronically absent per the 2021-22 civil-rights collection.
Discipline events run high: 379 in- and out-of-school suspensions were reported for 1,654 students in the 2021-22 Civil Rights Data Collection.
The federal civil-rights collection also records 42 expulsions at this campus for 2021-22.
Among Slidell's high schools, it stands alongside Northshore High School (1,518 students): Slidell High School is larger than that campus by headcount and runs leaner classes (17.8:1 vs 18.5:1).
St. Tammany Parish also operates Mandeville High School (2,006 students) and Covington High School (1,600 students) alongside Slidell 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 Slidell High School compares
Slidell High School on the metrics families compare, against Louisiana and U.S. means.
| Metric | This school | vs Louisiana | Louisiana avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 17.8:1 | ▲ 6% | 16.8:1 | 15.7:1 |
| Free-lunch eligible | 45.0% | ▼ 28% | 62.5% | 51.7% |
| Enrollment | 1,654 | top 2% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
17.8:1
Leaner classes than 26% of US schools, heavier class loads than most.
1,654
Bigger than 97% of US schools by enrollment, a large campus nationally.
Equity indicators (what these measure)
Economic need
45.0%
free-lunch eligible
- 28% below the Louisiana average of 62.5%
Above the 40% Title I schoolwide threshold; federal funds support the whole school, not individual students.
Staffing depth
17.8:1
students per teacher
- 6% above state mean
Top 67% in Louisiana - lower ratio than 33% of state schools
Between 16:1 and 20:1, squarely in the typical U.S. public-school staffing range.
Engagement
19.6%
chronically absent (missed 10%+ of school days)
In the 15-20% range, nearing the "high" absenteeism threshold.
Funding equity
$14,024
per pupil, district-wide
- below Louisiana avg of $16,376
Somewhat below the U.S. average per-pupil spend; funding constraints may affect programs, facilities, and staffing.
Support staff
Counselors4.0 FTE
Per 414 students, the combined health-and-guidance staffing load for this school.
Discipline context
107
in-school suspensions + 272 out-of-school
Suspension rate: 6.5 per 100 students. Combined in-school and out-of-school rate: 22.9 per 100 students. Reported via the Civil Rights Data Collection. Includes 42 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 45.1%
African American 37.1%
Hispanic or Latino 10.3%
Two or More 5.8%
Asian 1.0%
American Indian / Alaska Native 0.5%
Native Hawaiian / Pacific Islander 0.2%
Largest group: White at 45.1% of enrollment.
Student-body diversity index 64.5/100
Simpson diversity index - at 64.5, Slidell High School is more mixed than the Louisiana school average of 43.9.
Programs
AP courses offered 2
Gifted & talented Yes
Funding & spending
District-wide per-pupil expenditure for St. Tammany Parish, which includes Slidell High School.
$14,024
Per student
-14%
vs Louisiana
Avg $16,376
-15%
vs U.S.
Avg $16,593
Revenue mix
Local 51.9%
State 38.3%
Federal 9.8%
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 Slidell High School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Mandeville High School | Similar size | Lower economic need | Similar S:T ratio |
| Covington High School | Similar size | Similar economic need | Higher S:T ratio |
| Northshore High School | Similar size | Lower economic need | Similar S:T ratio |
| Joseph B. Lancaster Elementary School | Similar size | Lower economic need | Higher S:T ratio |
| Fontainebleau High School | Similar size | Lower economic need | Similar S:T ratio |
Comparisons are relative to Slidell High School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 2,006
- Students per teacher
- 19.1:1
- Resource Index
- 47/100
- Enrollment
- 1,600
- Students per teacher
- 19.5:1
- Resource Index
- 35/100
- Enrollment
- 1,518
- Students per teacher
- 18.5:1
- Resource Index
- 49/100
- Enrollment
- 1,480
- Students per teacher
- 21.1:1
- Resource Index
- 45/100
- Enrollment
- 1,451
- Students per teacher
- 17.1:1
- Resource Index
- 45/100
Similar high schools in Slidell
2 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 Louisiana, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~1,654 students)
Similar student-teacher ratio (~17.8:1)
Next steps
Verify locally before acting on Slidell High School's federal record.
- Compare Slidell High School against another school. Compare schools
- St. Tammany Parish'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 Slidell High School
How many students attend Slidell High School?
Slidell High School has 1,654 students enrolled. It is a high school in Slidell, LA.
What is the student-teacher ratio at Slidell High School?
The student-teacher ratio at Slidell High School is 17.8:1, which is 6% higher than the Louisiana average of 16.8:1 and 13% higher than the national average of 15.7:1.
What percentage of students receive free lunch at Slidell High School?
45.0% of students at Slidell High School are eligible for free lunch, compared to the Louisiana average of 62.5%.
What is the racial and ethnic makeup of Slidell High School?
The largest demographic group at Slidell High School is White at 45.1% of enrollment, in Slidell, LA. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 64.5/100.
What is the Resource Investment Index for Slidell High School?
Slidell High School has a Resource Investment Index of 35/100 (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 Slidell High School rank among high schools in Slidell?
By Resource Investment Index, Slidell High School ranks #3 of 3 high schools in Slidell, LA. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all high schools in Slidell on the city page.
Is Slidell High School a good school?
Slidell High School earns 35/100 on the Resource Investment Index, with class sizes near the Louisiana median. It is also one of the largest schools in Louisiana. 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 St. Tammany Parish?
Besides Slidell High School, St. Tammany Parish also operates Mandeville High School (2,006 students), Covington High School (1,600 students), and Northshore High School (1,518 students). See the St. Tammany Parish 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.