- Enrollment
- 2,399
- Students per teacher
- 18:1
- Resource Index
- 27/100
High school (grades 9-12) · Plainfield, IL
Plainfield High School
Federal NCES profile for Plainfield High School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 28/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 173174003339
👥 S:T ratio 41
🌟 Gifted program 30
🎓 Counselors 40
📋 Attendance 0
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Plainfield High School earns 28/100 on the Resource Investment Index, with class sizes near the Illinois median. It is also one of the largest schools in Illinois.
- #3 of 4
- high schools in Plainfield · Resource Index
- 28
- Resource Index · Lower
- 14.8:1
- students per teacher
- 1,800
- students enrolled
Plainfield High School has class sizes near the Illinois median. Computed live against every Illinois school reporting to NCES.
By Resource Investment Index, Plainfield High School ranks #3 of 4 high schools in Plainfield, IL.
School address
District: Plainfield Sd 202 · Illinois
NCES ID 173174003339 Verify on NCES CCD record →
NCES CCD universe card
School universe 173174003339 · Plainfield, IL High · MID · TRAD
1,800 enr · 14.8:1 · RII 28
Nearest enrollment peer: Plainfield North High School (2,399 students)
Resource Investment Index #3 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 High School in the enrollment neighbourhood
Fall enrollment among this campus and nearest district peers
- Plainfield Nor
Plainfield North High School
2,399 students
- Plainfield Sou
Plainfield South High School
2,323 students
- Plainfield Eas
Plainfield East High School
1,825 students
- This school
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 High School reports 1,800 students on the CCD universe file.
How Plainfield High School compares
Plainfield 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 | 14.8:1 | ▲ 6% | 14:1 | 15.7:1 |
| Enrollment | 1,800 | top 3% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
14.8:1
Leaner classes than 49% of US schools, a middle-of-the-pack class size.
1,800
Bigger than 97% of US schools by enrollment, a large campus nationally.
Equity indicators (what these measure)
Staffing depth
14.8:1
students per teacher
- 6% above state mean
Top 67% in Illinois - lower ratio than 33% of state schools
Close to the 15:1 benchmark most often cited for individualized attention.
Engagement
45.7%
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
$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
Counselors6.0 FTE
Per 300 students, the combined health-and-guidance staffing load for this school.
Discipline context
138
in-school suspensions + 74 out-of-school
Suspension rate: 7.7 per 100 students. Combined in-school and out-of-school rate: 11.8 per 100 students. Reported via the Civil Rights Data Collection. Includes 5 expulsions.
Student demographics
White 48.6%
Hispanic or Latino 30.6%
African American 12.5%
Two or More 4.7%
Asian 3.4%
American Indian / Alaska Native 0.3%
Native Hawaiian / Pacific Islander 0.1%
Largest group: White at 48.6% of enrollment.
Student-body diversity index 65.1/100
Simpson diversity index - at 65.1, Plainfield High School is more mixed than the Illinois school average of 38.9.
Programs
AP courses offered 21
Funding & spending
District-wide per-pupil expenditure for Plainfield Sd 202, which includes Plainfield 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 High School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Plainfield North High School | Larger | No free-lunch data | Higher S:T ratio |
| Plainfield South High School | Larger | No free-lunch data | Higher S:T ratio |
| Plainfield East High School | Similar size | No free-lunch data | Similar 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 | Higher S:T ratio |
Comparisons are relative to Plainfield High School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 2,323
- Students per teacher
- 17:1
- Resource Index
- 32/100
- Enrollment
- 1,825
- Students per teacher
- 15.1:1
- Resource Index
- 29/100
- 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 (~1,800 students)
Frequently asked questions about Plainfield High School
How many students attend Plainfield High School?
Plainfield High School has 1,800 students enrolled. It is a high school in Plainfield, IL.
What is the student-teacher ratio at Plainfield High School?
The student-teacher ratio at Plainfield High School is 14.8:1, which is 6% higher than the Illinois average of 14:1 and 6% lower than the national average of 15.7:1.
What is the racial and ethnic makeup of Plainfield High School?
The largest demographic group at Plainfield High School is White at 48.6% of enrollment, in Plainfield, IL. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 65.1/100.
What is the Resource Investment Index for Plainfield High School?
Plainfield High School has a Resource Investment Index of 28/100 (lower 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 Plainfield High School rank among high schools in Plainfield?
By Resource Investment Index, Plainfield High School ranks #3 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 High School, Plainfield Sd 202 also operates Plainfield North High School (2,399 students), Plainfield South High School (2,323 students), and Plainfield East High School (1,825 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.