Enrollment
241
Colorado · 2024-25 NCES data
Elementary school (grades K-5) · Denver, CO
Castro Elementary School
Federal NCES profile for Castro Elementary School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 27/100.
2024-25 NCES dataElementary school (grades K-5)NCES 080336000424
👥 S:T ratio 52
🌟 Gifted program 30
📋 Attendance 0
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Castro Elementary School earns 27/100 on the Resource Investment Index, even as it posts class sizes smaller than 83% of Colorado schools.
- #29 of 31
- elementary schools in Denver · Resource Index
- 27
- Resource Index · Lower
- 12.1:1
- small classes for Colorado
- 90.7%
- free-lunch eligible
Castro Elementary School has class sizes smaller than 83% of Colorado schools. Computed live against every Colorado school reporting to NCES.
By Resource Investment Index, Castro Elementary School ranks #29 of 31 elementary schools in Denver, CO.
School address
NCES ID 080336000424 Verify on NCES CCD record →
Teachers (FTE)
20.0
Federal CCD staff survey
Students per teacher
12.1:1
vs 16.6:1 Colorado avg
-27% vs state
Free-lunch eligible
90.7%
vs 38.5% Colorado avg
+136% vs state
Student-teacher ratio in context
How Castro Elementary School compares with Colorado and U.S. medians
What stands out at Castro Elementary School
Castro Elementary School is a high-poverty, mid-sized elementary school in Denver, Colorado, enrolling 241 students.
Class sizes run a bit leaner than typical: 12.1:1 puts it in the smaller third of Colorado schools by student-teacher ratio.
Economic need is high: 90.7% of students qualify for free meals, 136% above the Colorado average, a Title I-weighted population that federal funding formulas prioritise.
Enrollment of 241 puts it in the smaller third of Colorado schools by headcount.
Its Resource Investment Index trails 94% of the 1,922 Colorado schools with a score on record, one of the lower results on this measure.
Among 62 similarly sized, similarly resourced-need Colorado schools statewide, it ranks #59, in the lower tier once campus size and economic need are matched.
Its student body is predominantly Hispanic or Latino (86% of enrollment) (diversity index 26/100).
Chronic absenteeism is elevated: 69.7% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
School District No. 1 in the County of Denver and State of C also operates East High School (2,476 students) and Northfield High School (2,137 students) alongside Castro Elementary 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 Castro Elementary School compares
Castro Elementary 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 | 12.1:1 | ▼ 27% | 16.6:1 | 15.7:1 |
| Free-lunch eligible | 90.7% | ▲ 136% | 38.5% | 51.7% |
| Enrollment | 241 | top 72% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
12.1:1
Leaner classes than 75% of US schools, among the more generously staffed nationally.
241
Bigger than 24% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Economic need
90.7%
free-lunch eligible
- 136% above the Colorado average of 38.5%
Well above the 40% Title I schoolwide threshold, among the highest-need profiles in the state; federal funds support the whole school, not individual students.
Staffing depth
12.1:1
students per teacher
- 27% below state mean
Top 17% in Colorado - lower ratio than 83% of state schools
Well under the widely cited 15:1 individualized-attention benchmark, among the leaner class loads nationally.
Engagement
69.7%
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
$15,336
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
Counselors0.0 FTE
Student-support staffing from the Civil Rights Data Collection.
Discipline context
0
in-school suspensions + 1 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 0.4 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
Hispanic or Latino 85.9%
African American 5.0%
Asian 2.9%
Native Hawaiian / Pacific Islander 2.9%
White 2.1%
Two or More 1.2%
Largest group: Hispanic or Latino at 85.9% of enrollment.
Student-body diversity index 25.7/100
Simpson diversity index - at 25.7, Castro Elementary School is less mixed than the Colorado school average of 47.1.
Programs
Funding & spending
District-wide per-pupil expenditure for School District No. 1 in the County of Denver and State of C, which includes Castro Elementary School.
$15,336
Per student
-6%
vs Colorado
Avg $16,273
-8%
vs U.S.
Avg $16,593
Revenue mix
Local 70.4%
State 16.8%
Federal 12.8%
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 Castro Elementary School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| East High School | Larger | Lower economic need | Higher S:T ratio |
| Northfield High School | Larger | Lower economic need | Higher S:T ratio |
| South High School | Larger | Lower economic need | Higher S:T ratio |
| North High School | Larger | Lower economic need | Higher S:T ratio |
| Thomas Jefferson High School | Larger | Lower economic need | Higher S:T ratio |
Comparisons are relative to Castro Elementary School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 2,476
- Students per teacher
- 20:1
- Resource Index
- 34/100
- Enrollment
- 2,137
- Students per teacher
- 21.6:1
- Resource Index
- 35/100
- Enrollment
- 1,950
- Students per teacher
- 21.4:1
- Resource Index
- 32/100
- Enrollment
- 1,653
- Students per teacher
- 16.7:1
- Resource Index
- 49/100
- Enrollment
- 1,390
- Students per teacher
- 18.8:1
- Resource Index
- 31/100
Similar elementary 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 (~241 students)
Next steps
Verify locally before acting on Castro Elementary School's federal record.
- Compare Castro Elementary School against another school. Compare schools
- School District No. 1 in the County of Denver and State of C'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 Castro Elementary School
How many students attend Castro Elementary School?
Castro Elementary School has 241 students enrolled. It is an elementary school in Denver, CO.
What is the student-teacher ratio at Castro Elementary School?
The student-teacher ratio at Castro Elementary School is 12.1:1, which is 27% lower than the Colorado average of 16.6:1 and 23% lower than the national average of 15.7:1. Lower ratios generally mean more individual attention per student.
What percentage of students receive free lunch at Castro Elementary School?
90.7% of students at Castro Elementary School are eligible for free lunch, compared to the Colorado average of 38.5%.
What is the racial and ethnic makeup of Castro Elementary School?
The largest demographic group at Castro Elementary School is Hispanic or Latino at 85.9% of enrollment, in Denver, CO.
What is the Resource Investment Index for Castro Elementary School?
Castro Elementary School has a Resource Investment Index of 27/100 (lower reported resources relative to schools nationally) based on 3 factors: student-teacher ratio, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Castro Elementary School rank among elementary schools in Denver?
By Resource Investment Index, Castro Elementary School ranks #29 of 31 elementary schools in Denver, CO. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all elementary schools in Denver on the city page.
Is Castro Elementary School a good school?
Castro Elementary School earns 27/100 on the Resource Investment Index, even as it posts class sizes smaller than 83% of Colorado schools. 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 School District No. 1 in the County of Denver and State of C?
Besides Castro Elementary School, School District No. 1 in the County of Denver and State of C also operates East High School (2,476 students), Northfield High School (2,137 students), and South High School (1,950 students). See the School District No. 1 in the County of Denver and State of C 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.