- Enrollment
- 2,589
- Students per teacher
- 14.6:1
- Resource Index
- 41/100
Middle school (grades 6-8) · Naperville, IL
Jefferson Jr High School
Federal NCES profile for Jefferson Jr High School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 42/100.
2024-25 NCES dataMiddle school (grades 6-8)NCES 172771002933
👥 S:T ratio 49
🌟 Gifted program 30
🎓 Counselors 45
📋 Attendance 43
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Jefferson Jr High 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.
- #7 of 7
- middle schools in Naperville · Resource Index
- 42
- Resource Index · Typical
- 12.8:1
- students per teacher
- 832
- students enrolled
Jefferson Jr High School has class sizes near the Illinois median. Computed live against every Illinois school reporting to NCES.
By Resource Investment Index, Jefferson Jr High School ranks #7 of 7 middle schools in Naperville, IL.
School address
District: Naperville Cusd 203 · Illinois
NCES ID 172771002933 Verify on NCES CCD record →
NCES CCD universe card
School universe 172771002933 · Naperville, IL Middle · MID · TRAD
832 enr · 12.8:1 · RII 42
Nearest enrollment peer: Naperville Central High School (2,589 students)
Resource Investment Index #7 of 7 middle schools in Naperville. NCES Common Core of Data stamps for this campus. Read with this school → · District book → · Illinois schools → · Find another →
Jefferson Jr High School in the enrollment neighbourhood
Fall enrollment among this campus and nearest district peers
- Naperville Cen
Naperville Central High School
2,589 students
- Naperville Nor
Naperville North High School
2,467 students
- Kennedy Junior 937
Kennedy Junior High School
937 students
- This school 832
Jefferson Jr High School
832 students
- Lincoln Jr Hig 774
Lincoln Jr High School
774 students
- Elmwood Elem S 726
Elmwood Elem School
726 students
What this shows Jefferson Jr High School reports 832 students on the CCD universe file.
How Jefferson Jr High School compares
Jefferson Jr High 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 | 12.8:1 | ▼ 9% | 14:1 | 15.7:1 |
| Enrollment | 832 | top 10% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
12.8:1
Leaner classes than 68% of US schools, among the more generously staffed nationally.
832
Bigger than 87% of US schools by enrollment, a large campus nationally.
Equity indicators (what these measure)
Staffing depth
12.8:1
students per teacher
- 9% below state mean
Top 39% in Illinois - lower ratio than 61% of state schools
Well under the widely cited 15:1 individualized-attention benchmark, among the leaner class loads nationally.
Engagement
22.7%
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
$22,199
per pupil, district-wide
- above Illinois avg of $18,196
Well above the U.S. public-school average, reflecting substantially higher local or state investment per enrolled student.
Support staff
Counselors3.0 FTE
Per 277 students, the combined health-and-guidance staffing load for this school.
Discipline context
47
in-school suspensions + 22 out-of-school
Suspension rate: 5.6 per 100 students. Combined in-school and out-of-school rate: 8.3 per 100 students. Reported via the Civil Rights Data Collection.
Student demographics
White 47.2%
Hispanic or Latino 24.7%
Asian 15.8%
African American 7.0%
Two or More 5.1%
American Indian / Alaska Native 0.4%
Largest group: White at 47.2% of enrollment.
Student-body diversity index 68.4/100
Simpson diversity index - at 68.4, Jefferson Jr High School is more mixed than the Illinois school average of 38.9.
Programs
Funding & spending
District-wide per-pupil expenditure for Naperville Cusd 203, which includes Jefferson Jr High School.
$22,199
Per student
+22%
vs Illinois
Avg $18,196
+26%
vs U.S.
Avg $17,658
Revenue mix
Local 69.9%
State 25.6%
Federal 4.4%
Source: NCES F-33 School District Finance Survey District-level finance · FY 2022-23 Per-pupil expenditure reflects the district-wide average. Individual school budgets are not reported at the federal level.
How Jefferson Jr High 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 | Similar size | No free-lunch data | Higher S:T ratio |
| Lincoln Jr High School | Similar size | No free-lunch data | Similar S:T ratio |
| Elmwood Elem School | Similar size | No free-lunch data | Higher S:T ratio |
Comparisons are relative to Jefferson Jr High School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 2,467
- Students per teacher
- 13.5:1
- Resource Index
- 36/100
- Enrollment
- 937
- Students per teacher
- 14.4:1
- Resource Index
- 54/100
- Enrollment
- 774
- Students per teacher
- 13.8:1
- Resource Index
- 44/100
- Enrollment
- 726
- Students per teacher
- 16.1:1
- Resource Index
- 41/100
Similar middle schools in Naperville
6 comparable middle schools (grades 6-8) serving the same city.
Scullen Middle School
Standard public school
948 students 14.8:1 students per teacher
Clifford Crone Middle School
Standard public school
891 students 16.2:1 students per teacher
Thayer J Hill Middle School
Standard public school
828 students 14.3:1 students per teacher
Gordon Gregory Middle School
Standard public school
811 students 15.6:1 students per teacher
Lincoln Jr High School
Standard public school
774 students 13.8:1 students per teacher
Madison Jr High School
Standard public school
566 students 12.9:1 students per teacher
Nationwide middle 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 (~832 students)
Frequently asked questions about Jefferson Jr High School
How many students attend Jefferson Jr High School?
Jefferson Jr High School has 832 students enrolled. It is a middle school in Naperville, IL.
What is the student-teacher ratio at Jefferson Jr High School?
The student-teacher ratio at Jefferson Jr High School is 12.8:1, which is 9% lower than the Illinois average of 14:1 and 18% 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 Jefferson Jr High School?
The largest demographic group at Jefferson Jr High School is White at 47.2% of enrollment, in Naperville, IL. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 68.4/100.
What is the Resource Investment Index for Jefferson Jr High School?
Jefferson Jr High School has a Resource Investment Index of 42/100 (typical reported resources relative to schools nationally) based on 4 factors: student-teacher ratio, gifted-program reporting, counselor availability, chronic absenteeism. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Jefferson Jr High School rank among middle schools in Naperville?
By Resource Investment Index, Jefferson Jr High School ranks #7 of 7 middle 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 middle schools in Naperville on the city page.
What other schools are in Naperville Cusd 203?
Besides Jefferson Jr High 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.
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, the data changelog, or report a data error. Data current as of August 2026.