Enrollment
403
Illinois · 2024-25 NCES data
Middle school (grades 6-8) · Downers Grove, IL
O Neill Middle School
Federal NCES profile for O Neill Middle School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 57/100.
2024-25 NCES dataMiddle school (grades 6-8)NCES 171254001514
👥 S:T ratio 42
🌟 Gifted program 70
📋 Attendance 58
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
O Neill Middle School earns 57/100 on the Resource Investment Index, with class sizes near the Illinois median.
- #1 of 3
- middle schools in Downers Grove · Resource Index
- 57
- Resource Index · Higher
- 14.4:1
- students per teacher
- 403
- students enrolled
O Neill Middle School has class sizes near the Illinois median. Computed live against every Illinois school reporting to NCES.
By Resource Investment Index, O Neill Middle School ranks #1 of 3 middle schools in Downers Grove, IL.
School address
District: Downers Grove Gsd 58 · Illinois
NCES ID 171254001514 Verify on NCES CCD record →
Teachers (FTE)
28.0
Federal CCD staff survey
Students per teacher
14.4:1
vs 14:1 Illinois avg
+3% vs state
Student-teacher ratio in context
How O Neill Middle School compares with Illinois and U.S. medians
What stands out at O Neill Middle School
O Neill Middle School is a mid-sized middle school in Downers Grove, Illinois, enrolling 403 students.
Class loads run somewhat heavier than typical: 14.4:1 puts it in the larger third of Illinois schools by student-teacher ratio.
With 403 students, its enrollment sits close to the Illinois median campus size.
Its Resource Investment Index outscores 91% of the 3,845 Illinois schools with a score on record, a top-tier result on this measure.
Its student body is led by White (67%) and Hispanic or Latino (17%) (diversity index 52/100).
16.9% of students were chronically absent in the 2021-22 collection, in line with the post-pandemic national range.
Among Downers Grove's middle schools, it stands alongside Herrick Middle School (626 students): O Neill Middle School is smaller than that campus by headcount and runs leaner classes (14.4:1 vs 16.9:1).
Downers Grove Gsd 58 also operates Herrick Middle School (626 students) and Lester Elem School (531 students) alongside O Neill Middle 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 O Neill Middle School compares
O Neill Middle School on the metrics families compare, against Illinois and U.S. means.
| Metric | This school | vs Illinois | Illinois avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 14.4:1 | ▲ 3% | 14:1 | 15.7:1 |
| Enrollment | 403 | top 45% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
14.4:1
Leaner classes than 53% of US schools, a middle-of-the-pack class size.
403
Bigger than 48% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Staffing depth
14.4:1
students per teacher
- 3% above state mean
Top 62% in Illinois - lower ratio than 38% of state schools
Close to the 15:1 benchmark most often cited for individualized attention.
Engagement
16.9%
chronically absent (missed 10%+ of school days)
In the 15-20% range, nearing the "high" absenteeism threshold.
Funding equity
$18,577
per pupil, district-wide
- above Illinois avg of $17,042
Somewhat above the U.S. public-school average, reflecting higher local or state investment per enrolled student.
Support staff
Counselors0.0 FTE
Student-support staffing from the Civil Rights Data Collection.
Discipline context
14
in-school suspensions + 8 out-of-school
Suspension rate: 3.5 per 100 students. Combined in-school and out-of-school rate: 5.5 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 66.5%
Hispanic or Latino 16.9%
Two or More 7.2%
Asian 5.5%
African American 4.0%
Largest group: White at 66.5% of enrollment.
Student-body diversity index 51.9/100
Simpson diversity index - at 51.9, O Neill Middle School is more mixed than the Illinois school average of 38.9.
Programs
Gifted & talented Yes
Funding & spending
District-wide per-pupil expenditure for Downers Grove Gsd 58, which includes O Neill Middle School.
$18,577
Per student
+9%
vs Illinois
Avg $17,042
+12%
vs U.S.
Avg $16,593
Revenue mix
Local 69.0%
State 26.6%
Federal 4.4%
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 O Neill Middle School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Herrick Middle School | Larger | No free-lunch data | Higher S:T ratio |
| Lester Elem School | Larger | No free-lunch data | Higher S:T ratio |
| Hillcrest Elem School | Similar size | No free-lunch data | Higher S:T ratio |
| Kingsley Elem School | Similar size | No free-lunch data | Lower S:T ratio |
| Highland Elem School | Similar size | No free-lunch data | Higher S:T ratio |
Comparisons are relative to O Neill Middle School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 626
- Students per teacher
- 16.9:1
- Resource Index
- 54/100
- Enrollment
- 531
- Students per teacher
- 18.3:1
- Resource Index
- 63/100
- Enrollment
- 382
- Students per teacher
- 15.9:1
- Resource Index
- 65/100
- Enrollment
- 359
- Students per teacher
- 12.4:1
- Resource Index
- 70/100
- Enrollment
- 352
- Students per teacher
- 16:1
- Resource Index
- 62/100
Similar middle schools in Downers Grove
2 comparable middle schools (grades 6-8) serving the same city.
Similar middle schools statewide
Matched by enrollment size and by staffing ratio across all of Illinois, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~403 students)
Similar student-teacher ratio (~14.4:1)
Next steps
Verify locally before acting on O Neill Middle School's federal record.
- Compare O Neill Middle School against another school. Compare schools
- Downers Grove Gsd 58'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 O Neill Middle School
How many students attend O Neill Middle School?
O Neill Middle School has 403 students enrolled. It is a middle school in Downers Grove, IL.
What is the student-teacher ratio at O Neill Middle School?
The student-teacher ratio at O Neill Middle School is 14.4:1, which is 3% higher than the Illinois average of 14:1 and 8% lower than the national average of 15.7:1.
What is the racial and ethnic makeup of O Neill Middle School?
The largest demographic group at O Neill Middle School is White at 66.5% of enrollment, in Downers Grove, IL. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 51.9/100.
What is the Resource Investment Index for O Neill Middle School?
O Neill Middle School has a Resource Investment Index of 57/100 (higher 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 O Neill Middle School rank among middle schools in Downers Grove?
By Resource Investment Index, O Neill Middle School ranks #1 of 3 middle schools in Downers Grove, IL. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all middle schools in Downers Grove on the city page.
Is O Neill Middle School a good school?
O Neill Middle School earns 57/100 on the Resource Investment Index, with class sizes near the Illinois median. 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 Downers Grove Gsd 58?
Besides O Neill Middle School, Downers Grove Gsd 58 also operates Herrick Middle School (626 students), Lester Elem School (531 students), and Hillcrest Elem School (382 students). See the Downers Grove Gsd 58 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.