Enrollment
1,748
Colorado · 2024-25 NCES data
High school (grades 9-12) · Centennial, CO
Arapahoe High School
Federal NCES profile for Arapahoe High School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 49/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 080531000873
👥 S:T ratio 16
📚 AP courses 75
🌟 Gifted program 70
🎓 Counselors 36
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Arapahoe High School earns 49/100 on the Resource Investment Index, with class sizes larger than 90% of Colorado schools. It is also one of the largest schools in Colorado.
- #3 of 3
- high schools in Centennial · Resource Index
- 49
- Resource Index · Higher
- 21.1:1
- large classes for Colorado
- 6.1%
- free-lunch eligible
Arapahoe High School has class sizes larger than 90% of Colorado schools. Computed live against every Colorado school reporting to NCES.
By Resource Investment Index, Arapahoe High School ranks #3 of 3 high schools in Centennial, CO.
School address
NCES ID 080531000873 Verify on NCES CCD record →
Teachers (FTE)
83.0
Federal CCD staff survey
Students per teacher
21.1:1
vs 16.6:1 Colorado avg
+27% vs state
Free-lunch eligible
6.1%
vs 38.5% Colorado avg
-84% vs state
Student-teacher ratio in context
How Arapahoe High School compares with Colorado and U.S. medians
What stands out at Arapahoe High School
Arapahoe High School is a lower-poverty, large high school in Centennial, Colorado, enrolling 1,748 students.
Class loads run heavy: 21.1:1 is larger than about 90% of Colorado schools and 27% above the 16.6:1 state mean, so each teacher carries more students than is typical.
Comparatively few students face economic hardship here, 6.1% free-meal eligibility runs 84% below the Colorado average.
By headcount it is one of the larger campuses in Colorado, bigger than 98% of state schools at 1,748 students.
Its Resource Investment Index sits near the middle of the pack among 1,922 scored Colorado schools.
Against 50 statewide peers matched on enrollment and economic need, it ranks in the upper tier at #19.
Its student body is led by White (79%) and Hispanic or Latino (11%) (diversity index 36/100).
On the academic-pipeline side it reports 15 Advanced Placement courses.
Counselor coverage runs a bit thin, about 318 students per counselor, somewhat past the ASCA-recommended 250:1 benchmark.
The federal civil-rights collection also records 1 expulsion at this campus for 2021-22.
Littleton School District No. 6 in the County of Arapahoe also operates Heritage High School (1,748 students) and Littleton High School (1,187 students) alongside Arapahoe 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 Arapahoe High School compares
Arapahoe High School on the metrics families compare, against Colorado and U.S. means.
| Metric | This school | vs Colorado | Colorado avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 21.1:1 | ▲ 27% | 16.6:1 | 15.7:1 |
| Free-lunch eligible | 6.1% | ▼ 84% | 38.5% | 51.7% |
| Enrollment | 1,748 | top 2% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
21.1:1
Leaner classes than 13% of US schools, heavier class loads than most.
1,748
Bigger than 97% of US schools by enrollment, a large campus nationally.
Equity indicators (what these measure)
Economic need
6.1%
free-lunch eligible
- 84% below the Colorado average of 38.5%
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
21.1:1
students per teacher
- 27% above state mean
Top 90% in Colorado - lower ratio than 10% of state schools
Above 20:1, running heavier than the typical U.S. public school; staffing is comparatively stretched.
Funding equity
$13,988
per pupil, district-wide
- below Colorado avg of $16,273
Somewhat below the U.S. average per-pupil spend; funding constraints may affect programs, facilities, and staffing.
Support staff
Counselors5.5 FTE
Per 318 students, the combined health-and-guidance staffing load for this school.
Discipline context
6
in-school suspensions + 47 out-of-school
Suspension rate: 0.3 per 100 students. Combined in-school and out-of-school rate: 3.0 per 100 students. Reported via the Civil Rights Data Collection. Includes 1 expulsion.
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 79.1%
Hispanic or Latino 11.3%
Two or More 5.5%
African American 1.9%
Asian 1.9%
Native Hawaiian / Pacific Islander 0.3%
Largest group: White at 79.1% of enrollment.
Student-body diversity index 35.8/100
Simpson diversity index - at 35.8, Arapahoe High School is less mixed than the Colorado school average of 47.1.
Programs
AP courses offered 15
Gifted & talented Yes
Funding & spending
District-wide per-pupil expenditure for Littleton School District No. 6 in the County of Arapahoe, which includes Arapahoe High School.
$13,988
Per student
-14%
vs Colorado
Avg $16,273
-16%
vs U.S.
Avg $16,593
Revenue mix
Local 64.6%
State 30.4%
Federal 5.0%
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 Arapahoe High School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Heritage High School | Similar size | Similar economic need | Similar S:T ratio |
| Littleton High School | Smaller | Higher economic need | Lower S:T ratio |
| Newton Middle School | Smaller | Similar economic need | Lower S:T ratio |
| Ford Elementary | Smaller | Similar economic need | Lower S:T ratio |
| Euclid Middle School | Smaller | Higher economic need | Lower S:T ratio |
Comparisons are relative to Arapahoe High School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,748
- Students per teacher
- 20.8:1
- Resource Index
- 43/100
- Enrollment
- 1,187
- Students per teacher
- 16.7:1
- Resource Index
- 41/100
- Enrollment
- 781
- Students per teacher
- 18.6:1
- Resource Index
- 48/100
- Enrollment
- 653
- Students per teacher
- 17.2:1
- Resource Index
- 51/100
- Enrollment
- 631
- Students per teacher
- 15:1
- Resource Index
- 49/100
Similar high schools statewide
Matched by enrollment size and by staffing ratio across all of Colorado, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~1,748 students)
Similar student-teacher ratio (~21.1:1)
Next steps
Verify locally before acting on Arapahoe High School's federal record.
- Compare Arapahoe High School against another school. Compare schools
- Littleton School District No. 6 in the County of Arapahoe'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 Arapahoe High School
How many students attend Arapahoe High School?
Arapahoe High School has 1,748 students enrolled. It is a high school in Centennial, CO.
What is the student-teacher ratio at Arapahoe High School?
The student-teacher ratio at Arapahoe High School is 21.1:1, which is 27% higher than the Colorado average of 16.6:1 and 34% higher than the national average of 15.7:1.
What percentage of students receive free lunch at Arapahoe High School?
6.1% of students at Arapahoe High School are eligible for free lunch, compared to the Colorado average of 38.5%.
What is the racial and ethnic makeup of Arapahoe High School?
The largest demographic group at Arapahoe High School is White at 79.1% of enrollment, in Centennial, CO.
What is the Resource Investment Index for Arapahoe High School?
Arapahoe High School has a Resource Investment Index of 49/100 (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 Arapahoe High School rank among high schools in Centennial?
By Resource Investment Index, Arapahoe High School ranks #3 of 3 high schools in Centennial, CO. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all high schools in Centennial on the city page.
Is Arapahoe High School a good school?
Arapahoe High School earns 49/100 on the Resource Investment Index, with class sizes larger than 90% of Colorado schools. It is also one of the largest schools in Colorado. 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 Littleton School District No. 6 in the County of Arapahoe?
Besides Arapahoe High School, Littleton School District No. 6 in the County of Arapahoe also operates Heritage High School (1,748 students), Littleton High School (1,187 students), and Newton Middle School (781 students). See the Littleton School District No. 6 in the County of Arapahoe district page for the complete list.
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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.