Enrollment
1,743
Idaho · 2024-25 NCES data
High school (grades 9-12) · Boise, ID
Centennial High School
Federal NCES profile for Centennial High School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 53/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 160210000674
👥 S:T ratio 23
📚 AP courses 75
🌟 Gifted program 70
🎓 Counselors 42
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Centennial High School earns 53/100 on the Resource Investment Index, with class sizes larger than 74% of Idaho schools. It is also one of the largest schools in Idaho.
- #2 of 7
- high schools in Boise · Resource Index
- 53
- Resource Index · Higher
- 19.2:1
- large classes for Idaho
- 16.1%
- free-lunch eligible
Centennial High School has class sizes larger than 74% of Idaho schools. Computed live against every Idaho school reporting to NCES.
By Resource Investment Index, Centennial High School ranks #2 of 7 high schools in Boise, ID.
School address
District: Joint School District No. 2 · Idaho
NCES ID 160210000674 Verify on NCES CCD record →
Teachers (FTE)
91.0
Federal CCD staff survey
Students per teacher
19.2:1
vs 17.1:1 Idaho avg
+12% vs state
Free-lunch eligible
16.1%
vs 29.3% Idaho avg
-45% vs state
Student-teacher ratio in context
How Centennial High School compares with Idaho and U.S. medians
What stands out at Centennial High School
Centennial High School is a lower-poverty, large high school in Boise, Idaho, enrolling 1,743 students.
Class loads run somewhat heavier than typical: 19.2:1 puts it in the larger third of Idaho schools by student-teacher ratio.
Economic need runs somewhat below the state's typical profile, with 16.1% of students eligible for free meals.
By headcount it is one of the larger campuses in Idaho, bigger than 99% of state schools at 1,743 students.
Its Resource Investment Index sits near the middle of the pack among 775 scored Idaho schools.
Among 36 similarly sized, similarly resourced-need Idaho schools statewide, it ranks #3, a top-tier result once campus size and economic need are matched.
Its student body is led by White (74%) and Hispanic or Latino (13%) (diversity index 43/100).
On the academic-pipeline side it reports 15 Advanced Placement courses.
Counselor coverage runs a bit thin, about 290 students per counselor, somewhat past the ASCA-recommended 250:1 benchmark.
The surrounding Joint School District No. 2 spends $8,438 per pupil, 29% below the Idaho average, a leaner-resourced district than most.
Joint School District No. 2 also operates Mountain View High School (2,463 students) and Owyhee High School (1,884 students) alongside Centennial 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 Centennial High School compares
Centennial High School on the metrics families compare, against Idaho and U.S. means.
| Metric | This school | vs Idaho | Idaho avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 19.2:1 | ▲ 12% | 17.1:1 | 15.7:1 |
| Free-lunch eligible | 16.1% | ▼ 45% | 29.3% | 51.7% |
| Enrollment | 1,743 | top 1% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
19.2:1
Leaner classes than 19% of US schools, heavier class loads than most.
1,743
Bigger than 97% of US schools by enrollment, a large campus nationally.
Equity indicators (what these measure)
Economic need
16.1%
free-lunch eligible
- 45% below the Idaho average of 29.3%
Below the 40% Title I threshold; federal aid targets individual qualifying students rather than schoolwide programs.
Staffing depth
19.2:1
students per teacher
- 12% above state mean
Top 74% in Idaho - lower ratio than 26% of state schools
Between 16:1 and 20:1, squarely in the typical U.S. public-school staffing range.
Funding equity
$8,438
per pupil, district-wide
- below Idaho avg of $11,939
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 290 students, the combined health-and-guidance staffing load for this school.
Discipline context
107
in-school suspensions + 38 out-of-school
Suspension rate: 6.1 per 100 students. Combined in-school and out-of-school rate: 8.3 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 74.2%
Hispanic or Latino 12.6%
African American 4.5%
Two or More 4.5%
Asian 3.7%
American Indian / Alaska Native 0.3%
Native Hawaiian / Pacific Islander 0.1%
Largest group: White at 74.2% of enrollment.
Student-body diversity index 42.8/100
Simpson diversity index - at 42.8, Centennial High School is more mixed than the Idaho school average of 36.3.
Programs
AP courses offered 15
Gifted & talented Yes
Funding & spending
District-wide per-pupil expenditure for Joint School District No. 2, which includes Centennial High School.
$8,438
Per student
-29%
vs Idaho
Avg $11,939
-49%
vs U.S.
Avg $16,593
Revenue mix
Local 22.0%
State 63.9%
Federal 14.1%
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 Centennial High School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Mountain View High School | Larger | Similar economic need | Higher S:T ratio |
| Owyhee High School | Similar size | Similar economic need | Higher S:T ratio |
| Rocky Mountain High School | Similar size | Lower economic need | Higher S:T ratio |
| Meridian High School | Similar size | Similar economic need | Similar S:T ratio |
| Eagle High School | Similar size | Lower economic need | Higher S:T ratio |
Comparisons are relative to Centennial High School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 2,463
- Students per teacher
- 21.8:1
- Resource Index
- 38/100
- Enrollment
- 1,884
- Students per teacher
- 23.8:1
- Resource Index
- 27/100
- Enrollment
- 1,848
- Students per teacher
- 22:1
- Resource Index
- 38/100
- Enrollment
- 1,774
- Students per teacher
- 18.9:1
- Resource Index
- 43/100
- Enrollment
- 1,765
- Students per teacher
- 21.8:1
- Resource Index
- 40/100
Similar high schools statewide
Matched by enrollment size and by staffing ratio across all of Idaho, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~1,743 students)
Similar student-teacher ratio (~19.2:1)
Next steps
Verify locally before acting on Centennial High School's federal record.
- Compare Centennial High School against another school. Compare schools
- Joint School District No. 2'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 Centennial High School
How many students attend Centennial High School?
Centennial High School has 1,743 students enrolled. It is a high school in Boise, ID.
What is the student-teacher ratio at Centennial High School?
The student-teacher ratio at Centennial High School is 19.2:1, which is 12% higher than the Idaho average of 17.1:1 and 22% higher than the national average of 15.7:1.
What percentage of students receive free lunch at Centennial High School?
16.1% of students at Centennial High School are eligible for free lunch, compared to the Idaho average of 29.3%.
What is the racial and ethnic makeup of Centennial High School?
The largest demographic group at Centennial High School is White at 74.2% of enrollment, in Boise, ID.
What is the Resource Investment Index for Centennial High School?
Centennial High School has a Resource Investment Index of 53/100 (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 Centennial High School rank among high schools in Boise?
By Resource Investment Index, Centennial High School ranks #2 of 7 high schools in Boise, ID. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all high schools in Boise on the city page.
Is Centennial High School a good school?
Centennial High School earns 53/100 on the Resource Investment Index, with class sizes larger than 74% of Idaho schools. It is also one of the largest schools in Idaho. 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 Joint School District No. 2?
Besides Centennial High School, Joint School District No. 2 also operates Mountain View High School (2,463 students), Owyhee High School (1,884 students), and Rocky Mountain High School (1,848 students). See the Joint School District No. 2 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.