High school (grades 9-12) · Seneca, IL
Seneca High School
Federal NCES profile for Seneca High School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 46/100.
The verdict
Seneca High School earns 46/100 on the Resource Investment Index, with class sizes smaller than 91% of Illinois schools.
- #1 of 3
- public schools in Seneca · Resource Index
- 46
- Resource Index · Typical
- 9.9:1
- small classes for Illinois
- 378
- students enrolled
Seneca High School has class sizes smaller than 91% of Illinois schools. Computed live against every Illinois school reporting to NCES.
By Resource Investment Index, Seneca High School ranks #1 of 3 public schools in Seneca, IL.
School address
NCES ID 173585003728 Verify on NCES CCD record →
CCD year-over-year · 2022-23 → 2023-24
-24 students YoY
Seneca High School shrank from 385 students in 2022-23 to 361 in 2023-24 (-6.2%).
Teacher FTE lost 38.0 → 36.0 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Shrinking CCD campus
-24 students YoY 173585003728 · Seneca, IL High · SMALL · TRAD
378 enr · 9.9:1 · RII 46
Nearest enrollment peer: Ashville High School (378 students)
Seneca High School shrank from 385 students in 2022-23 to 361 in 2023-24 (-6.2%). Teacher FTE lost 38.0 → 36.0 across the same CCD years. Read with this school → · District book → · Illinois schools → · Find another →
How Seneca High School compares
Seneca High School is a shrinking campus on CCD: ratios and free-lunch share vs Illinois and U.S. means.
| Metric | This school | vs Illinois | Illinois avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 9.9:1 | ▼ 29% | 14:1 | 15.7:1 |
| Enrollment | 378 | top 49% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
Equity indicators methodology
Student demographics
Largest group: White at 84.7% of enrollment.
Simpson diversity index - at 26.7, Seneca High School is less mixed than the Illinois school average of 38.9.
Programs
District finance for Seneca Twp Hsd 160 reports $36,057 per pupil (NCES F-33) - open the district page for the full revenue mix.
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 (~378 students)
Frequently asked questions about Seneca High School
How many students attend Seneca High School?
Seneca High School has 378 students enrolled. It is a high school in Seneca, IL. CCD year-over-year: 385 (2022-23) → 361 (2023-24), down 24.
What is the student-teacher ratio at Seneca High School?
The student-teacher ratio at Seneca High School is 9.9:1, which is 29% lower than the Illinois average of 14:1 and 37% 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 Seneca High School?
The largest demographic group at Seneca High School is White at 84.7% of enrollment, in Seneca, IL.
What is the Resource Investment Index for Seneca High School?
Seneca High School has a Resource Investment Index of 46/100 (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 Seneca High School rank among public schools in Seneca?
By Resource Investment Index, Seneca High School ranks #1 of 3 public schools in Seneca, IL. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking.
What other schools are in Seneca Twp Hsd 160?
None reported; Seneca Twp Hsd 160 operates only Seneca High School as a public school district in NCES's records.