- Enrollment
- 2,399
- Students per teacher
- 18:1
- Resource Index
- 27/100
High school (grades 9-12) · Plainfield, IL
Plainfield South High School
Federal NCES profile for Plainfield South High School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 32/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 173174004524
👥 S:T ratio 32
🌟 Gifted program 30
🎓 Counselors 34
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Plainfield South High School earns 32/100 on the Resource Investment Index, with class sizes larger than 87% of Illinois schools. It is also one of the largest schools in Illinois.
- #1 of 4
- high schools in Plainfield · Resource Index
- 32
- Resource Index · Typical
- 17:1
- large classes for Illinois
- 2,323
- students enrolled
Plainfield South High School has class sizes larger than 87% of Illinois schools. Computed live against every Illinois school reporting to NCES.
By Resource Investment Index, Plainfield South High School ranks #1 of 4 high schools in Plainfield, IL.
School address
District: Plainfield Sd 202 · Illinois
NCES ID 173174004524 Verify on NCES CCD record →
NCES CCD universe card
School universe 173174004524 · Plainfield, IL High · LARGE · TRAD
2,323 enr · 17:1 · RII 32
Nearest enrollment peer: Plainfield North High School (2,399 students)
Resource Investment Index #1 of 4 high schools in Plainfield. NCES Common Core of Data stamps for this campus. Read with this school → · District book → · Illinois schools → · Find another →
Plainfield South High School in the enrollment neighbourhood
Fall enrollment among this campus and nearest district peers
- Plainfield Nor
Plainfield North High School
2,399 students
- This school
Plainfield South High School
2,323 students
- Plainfield Eas
Plainfield East High School
1,825 students
- Plainfield Hig
Plainfield High School
1,800 students
- John F Kennedy 912
John F Kennedy Middle Sch
912 students
- Timber Ridge M 885
Timber Ridge Middle School
885 students
What this shows Plainfield South High School reports 2,323 students on the CCD universe file.
How Plainfield South High School compares
Plainfield South 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 | 17:1 | ▲ 21% | 14:1 | 15.7:1 |
| Enrollment | 2,323 | top 1% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
17:1
Leaner classes than 30% of US schools, heavier class loads than most.
2,323
Bigger than 99% of US schools by enrollment, a large campus nationally.
Equity indicators (what these measure)
Staffing depth
17:1
students per teacher
- 21% above state mean
Top 87% in Illinois - lower ratio than 13% of state schools
Between 16:1 and 20:1, squarely in the typical U.S. public-school staffing range.
Funding equity
$15,896
per pupil, district-wide
- below Illinois avg of $18,196
Somewhat below the U.S. average per-pupil spend; funding constraints may affect programs, facilities, and staffing.
Support staff
Counselors7.0 FTE
Per 332 students, the combined health-and-guidance staffing load for this school.
Discipline context
54
in-school suspensions + 40 out-of-school
Suspension rate: 2.3 per 100 students. Combined in-school and out-of-school rate: 4.0 per 100 students. Reported via the Civil Rights Data Collection. Includes 4 expulsions.
Student demographics
White 41.6%
Hispanic or Latino 31.5%
African American 19.6%
Two or More 4.3%
Asian 2.7%
American Indian / Alaska Native 0.3%
Largest group: White at 41.6% of enrollment.
Student-body diversity index 68.7/100
Simpson diversity index - at 68.7, Plainfield South High School is more mixed than the Illinois school average of 38.9.
Programs
AP courses offered 23
Funding & spending
District-wide per-pupil expenditure for Plainfield Sd 202, which includes Plainfield South High School.
$15,896
Per student
-13%
vs Illinois
Avg $18,196
-10%
vs U.S.
Avg $17,658
Revenue mix
Local 50.4%
State 43.1%
Federal 6.6%
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 Plainfield South High School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Plainfield North High School | Similar size | No free-lunch data | Similar S:T ratio |
| Plainfield East High School | Similar size | No free-lunch data | Lower S:T ratio |
| Plainfield High School | Similar size | No free-lunch data | Lower S:T ratio |
| John F Kennedy Middle Sch | Smaller | No free-lunch data | Similar S:T ratio |
| Timber Ridge Middle School | Smaller | No free-lunch data | Similar S:T ratio |
Comparisons are relative to Plainfield South High School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,825
- Students per teacher
- 15.1:1
- Resource Index
- 29/100
- Enrollment
- 1,800
- Students per teacher
- 14.8:1
- Resource Index
- 28/100
- Enrollment
- 912
- Students per teacher
- 16:1
- Resource Index
- 35/100
- Enrollment
- 885
- Students per teacher
- 17:1
- Resource Index
- 30/100
Similar high schools in Plainfield
3 comparable high schools (grades 9-12) serving the same city.
Nationwide high 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 (~2,323 students)
Similar student-teacher ratio (~17:1)
Frequently asked questions about Plainfield South High School
How many students attend Plainfield South High School?
Plainfield South High School has 2,323 students enrolled. It is a high school in Plainfield, IL.
What is the student-teacher ratio at Plainfield South High School?
The student-teacher ratio at Plainfield South High School is 17:1, which is 21% higher than the Illinois average of 14:1 and 8% higher than the national average of 15.7:1.
What is the racial and ethnic makeup of Plainfield South High School?
The largest demographic group at Plainfield South High School is White at 41.6% of enrollment, in Plainfield, IL. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 68.7/100.
What is the Resource Investment Index for Plainfield South High School?
Plainfield South High School has a Resource Investment Index of 32/100 (typical reported resources relative to schools nationally) based on 3 factors: student-teacher ratio, gifted-program reporting, counselor availability. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Plainfield South High School rank among high schools in Plainfield?
By Resource Investment Index, Plainfield South High School ranks #1 of 4 high schools in Plainfield, IL. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all high schools in Plainfield on the city page.
What other schools are in Plainfield Sd 202?
Besides Plainfield South High School, Plainfield Sd 202 also operates Plainfield North High School (2,399 students), Plainfield East High School (1,825 students), and Plainfield High School (1,800 students). See the Plainfield Sd 202 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.