Enrollment
324
High
DISTRICT 365 · STATE 834
SCHOOL COMMUNITY·RIVERDALE CUSD 100·NCES 173393003484
Riverdale Sr High School
9622 256th St N, Port Byron, IL 61275 · (309) 523-3181 · Rock Island County
GRADES 09–12HIGH41-RURALREGULAR SCHOOL324 STUDENTS
B+
allk12 Grade
Scored higher than 66% of Illinois public high schools
- A-Test scores Share of students meeting the state standard in reading, math, and other tested subjects, 2023-24 and 2024-25.
- C+Beats expectations How far test scores land above or below what the share of low-income students predicts for a school in this state.
- ·Three-year trend Not available for this school, so the grade uses the other parts.
Grades compare a school only with schools in the same state, because every state gives its own test. How grades work · Top-graded Illinois public high schools
Student : Teacher
11.9:1
27 FTE teachers
DISTRICT 13.0:1 · STATE 13.8:1
Free / Reduced Lunch
16%
52 students
DISTRICT 16% · STATE 56%
Community
0
0 members
Enrollment and student:teacher ratio compared against other high schools. Free/Reduced Lunch and demographics compared against all schools.
Enrollment by grade, 2024-25
| Grade | Students | Share |
|---|---|---|
| Grade 9 | 90 | 28% |
| Grade 10 | 89 | 27% |
| Grade 11 | 78 | 24% |
| Grade 12 | 67 | 21% |
Student demographics
20%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 22% · STATE 69% · US 70%
Student head counts by race/ethnicity from federal NCES enrollment data. District, state, and US figures are each group's share of all public school students in that area (US excludes territories). Very small groups may be suppressed in the source, so categories do not always sum exactly to total enrollment.
Gender split
School pathway
Feeds from
Based on grade levels within Riverdale CUSD 100. Attendance zones can vary; confirm enrollment with the district.
BeatsExpectations
Demographically-adjusted score · methodologyTier
AS EXPECTED
Performing as predicted given the school's student profile
Actual proficiency
51.9%
composite math + reading, all grades
Predicted
62.3%
based on IL schools with similar FRL share
Beats by
-10.4pp
below demographic expectation
What this means: About 52% of students here test proficient in math and reading, compared with the roughly 62% typical for Illinois schools with a similar share of low-income students. BeatsExpectations measures results against demographically similar schools rather than by raw scores, and this school falls within the typical range, neither among Illinois's top nor bottom 10%.
BeatsExpectations runs a per-state regression of proficiency on free/reduced-lunch share, then scores each school by residual. How this is calculated →
Schools most like Riverdale Sr High School
Riverdale Sr High School's state test result (51.9% proficient) is higher than 2 of the 5 schools below with a result.
| School | Students | Low-income | Proficient |
|---|---|---|---|
| Riverdale Sr High School this school | 324 | 16.0% | 51.9% |
| Tremont High School Tremont | 288 | 18.4% | 59.8% |
| Orion High School Orion | 285 | 17.9% | 50.9% |
| Williamsville High School Williamsville | 462 | 18.2% | 55.1% |
| Rockridge High School Taylor Ridge | 330 | 20.6% | 42.5% |
| Tri-Valley High School Downs | 329 | 9.4% | 61.9% |
Matched among Illinois high schools on enrollment, the share of students from low-income families (eligible for free or reduced-price lunch), and racial and ethnic makeup. Proficient is the average share of students meeting the state standard across all of the school's state tests in 2023-24 and 2024-25, the same combined score our test-score rankings use. Online schools and schools serving specialized populations are not matched.
Where Riverdale Sr High School ranks
Among high schools| Measure | This school | In Illinois | In Rock Island County |
|---|---|---|---|
| State test proficiency ranked highest first | 51.9% | #77 of 573 | #1 of 6 |
| Enrollment ranked largest first | 324 | #426 of 708 | #6 of 6 |
| Students per teacher ranked fewest first | 11.9:1 | #97 of 528 | #1 of 6 |
| Diversity index ranked most diverse first | 20.1% | #367 of 537 | #5 of 6 |
| Free and reduced lunch ranked highest share first | 16.0% | #569 of 578 | #6 of 6 |
| Enrollment change since 2017-18 ranked steepest decline first | -1.5% | #323 of 358 | N/A |
Ranked against other public high schools. Online schools are left out of every list, and test-score lists leave out schools that serve specialized populations. Each rank links to the full list. Arrows under a test-score rank show places moved since the prior test year, among schools tested both years.
4-year change
SY 2020-21 vs SY 2024-25Enrollment
324
-4 (-1%) vs 2020
-12% since 1990-91, when it was 368
Source: NCES Common Core of Data
Enrollment and staffing by year
| School year | Students | Teachers (FTE) | Students per teacher | Free and reduced lunch |
|---|---|---|---|---|
| 2024-25 | 324 | 27.3 | 11.9:1 | 16% (52) |
| 2023-24 | 308 | 25.3 | 12.2:1 | 16% (49) |
| 2022-23 | 312 | 27.1 | 11.5:1 | 20% (61) |
| 2020-21 | 328 | N/A | N/A | N/A |
| 2017-18 | 329 | 25 | 13.2:1 | 21% (68) |
| 2015-16 | 302 | 23 | 13.1:1 | 25% (77) |
| 2010-11 | 334 | 25 | 13.4:1 | 23% (78) |
| 2000-01 | 418 | 29 | 14.4:1 | N/A |
| 1990-91 | 368 | 24 | 15.3:1 | N/A |
Source: NCES Common Core of Data. Rows are the federal collections on file for Riverdale Sr High School.
Since 2017-18: students down 2% (329 to 324); teachers up 9% (25 to 27.3).
About Riverdale Sr High School
Riverdale Sr High School is one of the public schools in Port Byron, Illinois. It is a very small high school. It had 324 students in 2024-25, spanning grades 9 through 12. That compares with an average of about 834 students for high schools in Illinois.
Riverdale Sr High School is one school in Riverdale CUSD 100, a system of 3 schools with 1,095 students.
By race and ethnicity, Riverdale Sr High School is 89% White. Enrollment also includes 6% Hispanic and 4% multiracial. The school's White share is 17 points above the 72% share among Rock Island County residents. Its diversity index, the chance that two randomly chosen students belong to different racial or ethnic groups, is 20%.
Its staff includes 27.3 full-time-equivalent teachers, for about 11.9 students per teacher. Across high schools in Illinois, the average ratio is 13.8:1. Riverdale Sr High School has a free or reduced-price lunch rate of 16%. Among public schools in Rock Island County, the average eligibility rate is 65%.
Riverdale Sr High School holds a B+ allk12 Grade, placing it above 66% of Illinois public high schools.
On a poverty-adjusted basis, Riverdale Sr High School falls in the middle 80% of Illinois schools: 51.9% actual against 62.3% predicted.
In Rock Island County, home to about 142,757 people, median household income comes to about $67,159, 25% of adults hold a bachelor's degree or higher, and about 11% of residents live below the federal poverty line. Rock Island County's 57 public schools enroll about 21,921 students and include Riverdale Sr High School.
Riverdale Elementary School is about 0.2 miles away, making it the nearest public school. There are 3 more public schools inside five miles. Riverdale Sr High School's average proficiency of 51.9% compares with 67.2% for its nearest scored neighbors.
NCES assigns Riverdale Sr High School the locale Rural: Fringe, meaning in rural territory close to an urban area.
Enrollment was essentially flat over 4 years: 328 in 2020-21, 324 in 2024-25.
Use the discussion section to ask about special education services, counseling, and support programs at Riverdale Sr High School. You can also rate the school on this page.
Rock Island County at a glance
View full county profilePopulation
142,757
Census ACS
Median income
$67,159
Household, ACS
Bachelor's+
25%
Adults 25+
Poverty rate
11%
Below federal line
Schools in county
57
21,921 students
Quick facts
Related schools
Other schools in Riverdale CUSD 100
- Riverdale Elementary SchoolElementary · 517 students
- Riverdale Middle SchoolMiddle · 254 students
Other schools in Port Byron
- Riverdale Elementary SchoolElementary · 517 students
- Riverdale Middle SchoolMiddle · 254 students
Nearby schools
- Riverdale Elementary School0.2 mi · 517
- Riverdale Middle School0.3 mi · 254
- Bridgeview Elementary School4.9 mi · 343
- Cody Elementary School5.3 mi · 443
- Virgil Grissom Elementary School5.7 mi · 152
- Pleasant Valley Junior High School6.5 mi · 940
Frequently asked questions
About Riverdale Sr High SchoolHow many students attend Riverdale Sr High School?
Riverdale Sr High School enrolls approximately 324 students in grades 09-12.
Is Riverdale Sr High School an elementary, middle, or high school?
Riverdale Sr High School is a high school covering grades 09-12.
How many teachers does Riverdale Sr High School have?
Riverdale Sr High School employs 27 FTE teachers, for a student-to-teacher ratio of 11.9:1.
What is the racial breakdown of students at Riverdale Sr High School?
At Riverdale Sr High School, the student body is approximately 89% White, 6% Hispanic, 1% Black, 1% Asian, 4% Two or more.
Who oversees Riverdale Sr High School?
Riverdale Sr High School is overseen by Riverdale CUSD 100 in Rock Island County.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.