- Enrollment
- 2,032
- Students per teacher
- 18.1:1
- Resource Index
- 42/100
Other / mixed grade configuration · Troy, MI
Costello Elementary School
Federal NCES profile for Costello Elementary School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 38/100.
2024-25 NCES dataOther / mixed grade configurationNCES 263426006972
👥 S:T ratio 44
🌟 Gifted program 30
📋 Attendance 41
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Costello Elementary School earns 38/100 on the Resource Investment Index, with class sizes smaller than 76% of Michigan schools. It is also more racially and ethnically mixed than most Michigan schools.
- #2 of 7
- schools in Troy · Resource Index
- 38
- Resource Index · Typical
- 14.1:1
- small classes for Michigan
- 13.0%
- free-lunch eligible
Costello Elementary School has class sizes smaller than 76% of Michigan schools. Computed live against every Michigan school reporting to NCES.
By Resource Investment Index, Costello Elementary School ranks #2 of 7 schools in Troy, MI.
School address
District: Troy School District · Michigan
NCES ID 263426006972 Verify on NCES CCD record →
CCD year-over-year · 2022-23 → 2023-24
-25 students YoY
Costello Elementary School shrank from 431 students in 2022-23 to 406 in 2023-24 (-5.8%).
Teacher FTE lost 28.4 → 24.6 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Shrinking CCD campus
-25 students YoY 263426006972 · Troy, MI Other · SMALL · TRAD
395 enr · 14.1:1 · 13.0% lunch · RII 38
Nearest enrollment peer: Troy High School (2,032 students)
Costello Elementary School shrank from 431 students in 2022-23 to 406 in 2023-24 (-5.8%). Teacher FTE lost 28.4 → 24.6 across the same CCD years. Read with this school → · District book → · Michigan schools → · Find another →
Costello Elementary School in the enrollment neighbourhood
Fall enrollment among this campus and nearest district peers
- Troy High Scho
Troy High School
2,032 students
- Athens High Sc
Athens High School
1,468 students
- Larson Middle
Larson Middle School
865 students
- Boulan Park Mi
Boulan Park Middle School
839 students
- Baker Middle S 629
Baker Middle School
629 students
- This school 395
Costello Elementary School
395 students
What this shows Costello Elementary School reports 395 students on the CCD universe file.
How Costello Elementary School compares
Costello Elementary School is a shrinking campus on CCD: ratios and free-lunch share vs Michigan and U.S. means.
| Metric | This school | vs Michigan | Michigan avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 14.1:1 | ▼ 19% | 17.5:1 | 15.7:1 |
| Free-lunch eligible | 13.0% | ▼ 76% | 54.3% | 51.7% |
| Enrollment | 395 | top 42% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
14.1:1
Leaner classes than 56% of US schools, a middle-of-the-pack class size.
395
Bigger than 47% of US schools by enrollment, mid-sized for the country.
Equity indicators methodology
Economic need
13.0%
free-lunch eligible
- 76% below the Michigan average of 54.3%
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
14.1:1
students per teacher
- 19% below state mean
Top 24% in Michigan - lower ratio than 76% of state schools
Close to the 15:1 benchmark most often cited for individualized attention.
Engagement
23.8%
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
$15,761
per pupil, district-wide
- above Michigan avg of $15,012
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 + 3 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 0.8 per 100 students. Reported via the Civil Rights Data Collection.
Student demographics
White 54.9%
Asian 30.6%
Hispanic or Latino 6.3%
Two or More 5.8%
African American 1.8%
American Indian / Alaska Native 0.5%
Largest group: White at 54.9% of enrollment.
Student-body diversity index 59.7/100
Simpson diversity index - at 59.7, Costello Elementary School is more mixed than the Michigan school average of 36.2.
Programs
District finance for Troy School District reports $15,761 per pupil (NCES F-33) - open the district page for the full revenue mix.
How Costello Elementary School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Troy High School | Larger | Similar economic need | Higher S:T ratio |
| Athens High School | Larger | Similar economic need | Higher S:T ratio |
| Larson Middle School | Larger | Similar economic need | Higher S:T ratio |
| Boulan Park Middle School | Larger | Similar economic need | Higher S:T ratio |
| Baker Middle School | Larger | Higher economic need | Higher S:T ratio |
Comparisons are relative to Costello Elementary School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,468
- Students per teacher
- 16.9:1
- Resource Index
- 42/100
- Enrollment
- 865
- Students per teacher
- 21.1:1
- Resource Index
- 31/100
- Enrollment
- 839
- Students per teacher
- 17.9:1
- Resource Index
- 40/100
- Enrollment
- 629
- Students per teacher
- 17:1
- Resource Index
- 35/100
Nationwide other schools with similar size or staffing
Out-of-state peers matched by enrollment and by student-teacher ratio, not the same-city or same-district lists above.
Similar enrollment (~395 students)
Frequently asked questions about Costello Elementary School
How many students attend Costello Elementary School?
Costello Elementary School has 395 students enrolled. It is a public school in Troy, MI. CCD year-over-year: 431 (2022-23) → 406 (2023-24), down 25.
What is the student-teacher ratio at Costello Elementary School?
The student-teacher ratio at Costello Elementary School is 14.1:1, which is 19% lower than the Michigan average of 17.5:1 and 10% 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 Costello Elementary School?
13.0% of students at Costello Elementary School are eligible for free lunch, compared to the Michigan average of 54.3%.
What is the racial and ethnic makeup of Costello Elementary School?
The largest demographic group at Costello Elementary School is White at 54.9% of enrollment, in Troy, MI. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 59.7/100.
What is the Resource Investment Index for Costello Elementary School?
Costello Elementary School has a Resource Investment Index of 38/100 (typical reported resources relative to schools nationally) based on 3 factors: student-teacher ratio, gifted-program reporting, chronic absenteeism. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Costello Elementary School rank among schools in Troy?
By Resource Investment Index, Costello Elementary School ranks #2 of 7 schools in Troy, MI. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all schools in Troy on the city page.
What other schools are in Troy School District?
Besides Costello Elementary School, Troy School District also operates Troy High School (2,032 students), Athens High School (1,468 students), and Larson Middle School (865 students). See the Troy School District district page for the complete list.