Enrollment
324
Illinois · 2024-25 NCES data
High school (grades 9-12) · Port Byron, IL
Riverdale Sr High School
Federal NCES profile for Riverdale Sr High School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 40/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 173393003484
👥 S:T ratio 52
📚 AP courses 10
🌟 Gifted program 30
🎓 Counselors 68
📋 Attendance 41
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Riverdale Sr High School earns 40/100 on the Resource Investment Index, with class sizes smaller than 71% of Illinois schools.
- #2 of 3
- public schools in Port Byron · Resource Index
- 40
- Resource Index · Typical
- 12:1
- small classes for Illinois
- 324
- students enrolled
Riverdale Sr High School has class sizes smaller than 71% of Illinois schools. Computed live against every Illinois school reporting to NCES.
By Resource Investment Index, Riverdale Sr High School ranks #2 of 3 public schools in Port Byron, IL.
School address
District: Riverdale Cusd 100 · Illinois
NCES ID 173393003484 Verify on NCES CCD record →
Teachers (FTE)
27.0
Federal CCD staff survey
Students per teacher
12:1
vs 14:1 Illinois avg
-14% vs state
Student-teacher ratio in context
How Riverdale Sr High School compares with Illinois and U.S. medians
What stands out at Riverdale Sr High School
Riverdale Sr High School is a mid-sized high school in Port Byron, Illinois, enrolling 324 students.
Class sizes run a bit leaner than typical: 12:1 puts it in the smaller third of Illinois schools by student-teacher ratio.
With 324 students, its enrollment sits close to the Illinois median campus size.
Its Resource Investment Index lands in the upper third of 3,845 scored Illinois schools.
Its student body is predominantly White (89% of enrollment) (diversity index 20/100).
No Advanced Placement courses are reported for this campus in the federal data.
Counselor coverage is strong, about 162 students per counselor, inside the American School Counselor Association's recommended 250:1.
Attendance runs somewhat below the norm, with 23.5% of students chronically absent per the 2021-22 civil-rights collection.
The surrounding Riverdale Cusd 100 spends $12,896 per pupil, 24% below the Illinois average, a leaner-resourced district than most.
Riverdale Cusd 100 also operates Riverdale Elem School (517 students) and Riverdale Middle School (254 students) alongside Riverdale Sr High 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 Riverdale Sr High School compares
Riverdale Sr 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 | 12:1 | ▼ 14% | 14:1 | 15.7:1 |
| Enrollment | 324 | top 59% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
12:1
Leaner classes than 75% of US schools, among the more generously staffed nationally.
324
Bigger than 36% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Staffing depth
12:1
students per teacher
- 14% below state mean
Top 29% in Illinois - lower ratio than 71% of state schools
Well under the widely cited 15:1 individualized-attention benchmark, among the leaner class loads nationally.
Engagement
23.5%
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
$12,896
per pupil, district-wide
- below Illinois avg of $17,042
Well below the U.S. average per-pupil spend, a notably leaner funding position that may affect programs, facilities, and staffing.
Support staff
Counselors2.0 FTE
Per 162 students, the combined health-and-guidance staffing load for this school.
Discipline context
1
in-school suspensions + 9 out-of-school
Suspension rate: 0.3 per 100 students. Combined in-school and out-of-school rate: 3.1 per 100 students. Reported via the Civil Rights Data Collection.
Overview
- Common Core of Data (June 2026): enrollment, staffing, and the student-teacher ratio above.
- Civil Rights Data Collection: discipline counts and program access (AP, gifted, special education).
- F-33 School District Finance Survey: the district-wide per-pupil spending figures below.
Three separate federal collections, each on its own reporting cadence - which is why this school's numbers line up on a consistent basis against every other school and state on this site, rather than mixing figures pulled from different survey years.
Student demographics
White 89.1%
Hispanic or Latino 5.9%
Two or More 3.7%
African American 0.6%
Asian 0.6%
Largest group: White at 89.1% of enrollment.
Student-body diversity index 20.1/100
Simpson diversity index - at 20.1, Riverdale Sr High School is less mixed than the Illinois school average of 38.9.
Programs
AP program Not offered
Funding & spending
District-wide per-pupil expenditure for Riverdale Cusd 100, which includes Riverdale Sr High School.
$12,896
Per student
-24%
vs Illinois
Avg $17,042
-22%
vs U.S.
Avg $16,593
Revenue mix
Local 57.4%
State 35.8%
Federal 6.8%
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 Riverdale Sr High School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Riverdale Elem School | Larger | No free-lunch data | Higher S:T ratio |
| Riverdale Middle School | Similar size | No free-lunch data | Higher S:T ratio |
Comparisons are relative to Riverdale Sr High School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 517
- Students per teacher
- 14.8:1
- Resource Index
- 53/100
- Enrollment
- 254
- Students per teacher
- 15.9:1
- Resource Index
- 46/100
Similar high schools statewide
Matched by enrollment size and by staffing ratio across all of Illinois, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~324 students)
Similar student-teacher ratio (~12:1)
Next steps
Verify locally before acting on Riverdale Sr High School's federal record.
- Compare Riverdale Sr High School against another school. Compare schools
- Riverdale Cusd 100'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 Riverdale Sr High School
How many students attend Riverdale Sr High School?
Riverdale Sr High School has 324 students enrolled. It is a high school in Port Byron, IL.
What is the student-teacher ratio at Riverdale Sr High School?
The student-teacher ratio at Riverdale Sr High School is 12:1, which is 14% lower than the Illinois average of 14:1 and 24% 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 Riverdale Sr High School?
The largest demographic group at Riverdale Sr High School is White at 89.1% of enrollment, in Port Byron, IL.
What is the Resource Investment Index for Riverdale Sr High School?
Riverdale Sr High School has a Resource Investment Index of 40/100 (typical reported resources relative to schools nationally) based on 5 factors: student-teacher ratio, counselor availability, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Riverdale Sr High School rank among public schools in Port Byron?
By Resource Investment Index, Riverdale Sr High School ranks #2 of 3 public schools in Port Byron, IL. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all public schools in Port Byron on the city page.
Is Riverdale Sr High School a good school?
Riverdale Sr High School earns 40/100 on the Resource Investment Index, with class sizes smaller than 71% of 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 Riverdale Cusd 100?
Besides Riverdale Sr High School, Riverdale Cusd 100 also operates Riverdale Elem School (517 students) and Riverdale Middle School (254 students). See the Riverdale Cusd 100 district page for the complete list.
Related tools
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, or report a data error. Data current as of June 2026.