Enrollment
600
Illinois · 2024-25 NCES data
Elementary school (grades K-5) · Naperville, IL
Mill Street Elem School
Federal NCES profile for Mill Street Elem School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 42/100.
2024-25 NCES dataElementary school (grades K-5)NCES 172771002937
👥 S:T ratio 50
🌟 Gifted program 30
📋 Attendance 46
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Mill Street Elem School earns 42/100 on the Resource Investment Index, with class sizes near the Illinois median. It is also more racially and ethnically mixed than most Illinois schools.
- #22 of 27
- elementary schools in Naperville · Resource Index
- 42
- Resource Index · Typical
- 12.6:1
- students per teacher
- 600
- students enrolled
Mill Street Elem School has class sizes near the Illinois median. Computed live against every Illinois school reporting to NCES.
By Resource Investment Index, Mill Street Elem School ranks #22 of 27 elementary schools in Naperville, IL.
School address
District: Naperville Cusd 203 · Illinois
NCES ID 172771002937 Verify on NCES CCD record →
Teachers (FTE)
47.0
Federal CCD staff survey
Students per teacher
12.6:1
vs 14:1 Illinois avg
-10% vs state
Student-teacher ratio in context
How Mill Street Elem School compares with Illinois and U.S. medians
What stands out at Mill Street Elem School
Mill Street Elem School is a mid-sized elementary school in Naperville, Illinois, enrolling 600 students.
Class sizes run a bit leaner than typical: 12.6:1 puts it in the smaller third of Illinois schools by student-teacher ratio.
Enrollment of 600 puts it in the larger third of Illinois schools by headcount.
Its Resource Investment Index sits near the middle of the pack among 3,845 scored Illinois schools.
Its student body is led by White (46%) and Hispanic or Latino (20%), more mixed than most schools in the state (diversity index 70/100).
Attendance runs somewhat below the norm, with 21.5% of students chronically absent per the 2021-22 civil-rights collection.
The surrounding Naperville Cusd 203 spends $21,103 per pupil, 24% above the Illinois average, a better-resourced district than most.
Among Naperville's elementary schools, it stands alongside Elmwood Elem School (726 students): Mill Street Elem School is smaller than that campus by headcount and runs leaner classes (12.6:1 vs 15.8:1).
Naperville Cusd 203 also operates Naperville Central High School (2,589 students) and Naperville North High School (2,467 students) alongside Mill Street Elem 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 Mill Street Elem School compares
Mill Street Elem 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 | 12.6:1 | ▼ 10% | 14:1 | 15.7:1 |
| Enrollment | 600 | top 21% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
12.6:1
Leaner classes than 73% of US schools, among the more generously staffed nationally.
600
Bigger than 73% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Staffing depth
12.6:1
students per teacher
- 10% below state mean
Top 36% in Illinois - lower ratio than 64% of state schools
Well under the widely cited 15:1 individualized-attention benchmark, among the leaner class loads nationally.
Engagement
21.5%
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
$21,103
per pupil, district-wide
- above Illinois avg of $17,042
Well above the U.S. public-school average, reflecting substantially higher local or state investment per enrolled student.
Support staff
Counselors0.0 FTE
Student-support staffing from the Civil Rights Data Collection.
Discipline context
0
in-school suspensions + 0 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 0.0 per 100 students. Reported via the Civil Rights Data Collection.
Overview
Enrollment 600 Top 21% in Illinois - larger than 79% of 3,845 state schools
Teachers (FTE) 47.0
Students per teacher 12.6:1 -10% vs state
Free-lunch eligible -
NCES ID 172771002937
Student demographics
White 46.3%
Hispanic or Latino 20.3%
Asian 15.8%
African American 10.5%
Two or More 6.8%
American Indian / Alaska Native 0.2%
Largest group: White at 46.3% of enrollment.
Student-body diversity index 70.4/100
Simpson diversity index - at 70.4, Mill Street Elem School is more mixed than the Illinois school average of 38.9.
Programs & staff
Counselors (FTE) 0.0
Discipline & special education
Chronically absent 21.5%
In-school suspensions 0
Out-of-school suspensions 0
Funding & spending
District-wide per-pupil expenditure for Naperville Cusd 203, which includes Mill Street Elem School.
$21,103
Per student
+24%
vs Illinois
Avg $17,042
+27%
vs U.S.
Avg $16,593
Revenue mix
Local 69.9%
State 25.6%
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 Mill Street Elem School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Naperville Central High School | Larger | No free-lunch data | Higher S:T ratio |
| Naperville North High School | Larger | No free-lunch data | Similar S:T ratio |
| Kennedy Junior High School | Larger | No free-lunch data | Higher S:T ratio |
| Jefferson Jr High School | Larger | No free-lunch data | Similar S:T ratio |
| Lincoln Jr High School | Larger | No free-lunch data | Similar S:T ratio |
Comparisons are relative to Mill Street Elem School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 2,589
- Students per teacher
- 14.4:1
- Resource Index
- 42/100
- Enrollment
- 2,467
- Students per teacher
- 14:1
- Resource Index
- 35/100
- Enrollment
- 937
- Students per teacher
- 14.3:1
- Resource Index
- 54/100
- Enrollment
- 832
- Students per teacher
- 12.6:1
- Resource Index
- 42/100
- Enrollment
- 774
- Students per teacher
- 13.7:1
- Resource Index
- 44/100
Similar elementary schools in Naperville
6 comparable elementary schools (grades K-5) serving the same city.
Elmwood Elem School
Standard public school
726 students 15.8:1 students per teacher
May Watts Elementary School
Standard public school
668 students 16.1:1 students per teacher
Steeple Run Elem School
Standard public school
622 students 13.6:1 students per teacher
Beebe Elem School
Standard public school
619 students 14:1 students per teacher
Mary Lou Cowlishaw Elementary
Standard public school
589 students 12.7:1 students per teacher
Ranch View Elementary School
Standard public school
584 students 14.6:1 students per teacher
Next steps
Verify locally before acting on Mill Street Elem School's federal record.
- Compare Mill Street Elem School against another school. Compare schools
- Naperville Cusd 203'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 Mill Street Elem School
How many students attend Mill Street Elem School?
Mill Street Elem School has 600 students enrolled. It is an elementary school in Naperville, IL.
What is the student-teacher ratio at Mill Street Elem School?
The student-teacher ratio at Mill Street Elem School is 12.6:1, which is 10% lower than the Illinois average of 14:1 and 20% lower than the national average of 15.7:1. Lower ratios generally mean more individual attention per student.
What is the racial and ethnic makeup of Mill Street Elem School?
The largest demographic group at Mill Street Elem School is White at 46.3% of enrollment, in Naperville, IL. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 70.4/100.
What is the Resource Investment Index for Mill Street Elem School?
Mill Street Elem School has a Resource Investment Index of 42/100 (typical 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 Mill Street Elem School rank among elementary schools in Naperville?
By Resource Investment Index, Mill Street Elem School ranks #22 of 27 elementary schools in Naperville, IL. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all elementary schools in Naperville on the city page.
Is Mill Street Elem School a good school?
Mill Street Elem School earns 42/100 on the Resource Investment Index, with class sizes near the Illinois median. It is also more racially and ethnically mixed than most Illinois 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 Naperville Cusd 203?
Besides Mill Street Elem School, Naperville Cusd 203 also operates Naperville Central High School (2,589 students), Naperville North High School (2,467 students), and Kennedy Junior High School (937 students). See the Naperville Cusd 203 district page for the complete list.