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How has O Fallon High School changed in the last five years, for better or worse?
Community prompt from u/allk12. Replies below.
Enrollment
2,540
High
STATE 834
SCHOOL COMMUNITY·O FALLON TWP HSD 203·NCES 172979003090
O Fallon High School
600 S Smiley St, O Fallon, IL 62269 · (618) 632-3507 · St. Clair County
GRADES 09–12HIGH21-SUBURBREGULAR SCHOOL2,540 STUDENTS
Student : Teacher
16.3:1
156 FTE teachers
STATE 13.8:1
Free / Reduced Lunch
28%
715 students
STATE 56%
Community
5
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 | 619 | 24% |
| Grade 10 | 662 | 26% |
| Grade 11 | 630 | 25% |
| Grade 12 | 629 | 25% |
Student demographics
59%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
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
BeatsExpectations
Demographically-adjusted score · methodologyTier
AS EXPECTED
Performing as predicted given the school's student profile
Actual proficiency
51.7%
composite math + reading, all grades
Predicted
55.3%
based on IL schools with similar FRL share
Beats by
-3.6pp
below demographic expectation
What this means: About 52% of students here test proficient in math and reading, compared with the roughly 55% 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 O Fallon High School
O Fallon High School's state test result (51.7% proficient) is higher than 1 of the 5 schools below with a result.
| School | Students | Low-income | Proficient |
|---|---|---|---|
| O Fallon High School this school | 2,540 | 28.1% | 51.7% |
| Yorkville High School Yorkville | 2,266 | 25.8% | 44.4% |
| Mascoutah High School Mascoutah | 1,243 | 21.8% | 58.9% |
| Hononegah CHD High School Rockton | 1,814 | 24.7% | 63.2% |
| Edwardsville High School Edwardsville | 2,342 | 19.0% | 56.9% |
| Oak Park & River Forest High School Oak Park | 3,307 | 18.1% | 68.2% |
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 O Fallon High School ranks
Among high schools| Measure | This school | In Illinois | In St. Clair County |
|---|---|---|---|
| State test proficiency ranked highest first | 51.7% | #79 of 573 | #3 of 12 |
| Enrollment ranked largest first | 2,540 | #42 of 708 | #2 of 14 |
| Students per teacher ranked fewest first | 16.3:1 | #425 of 528 | #9 of 11 |
| Diversity index ranked most diverse first | 59.0% | #118 of 537 | #4 of 11 |
| Free and reduced lunch ranked highest share first | 28.1% | #512 of 578 | #10 of 12 |
| Enrollment change since 2017-18 ranked fastest growth first | +5.4% | #112 of 191 | #3 of 7 |
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
2,540
+29 (+1%) vs 2020
+85% since 1990-91, when it was 1,372
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 | 2,540 | 155.5 | 16.3:1 | 28% (715) |
| 2023-24 | 2,559 | 155 | 16.5:1 | 24% (609) |
| 2022-23 | 2,521 | 149.1 | 16.9:1 | 25% (627) |
| 2020-21 | 2,511 | N/A | N/A | N/A |
| 2017-18 | 2,409 | 131.8 | 18.3:1 | 22% (523) |
| 2015-16 | 2,384 | 133 | 17.9:1 | 24% (582) |
| 2010-11 | 2,489 | 135 | 18.4:1 | 16% (398) |
| 2000-01 | 2,010 | 106 | 19.0:1 | N/A |
| 1990-91 | 1,372 | 67 | 20.5:1 | N/A |
Source: NCES Common Core of Data. Rows are the federal collections on file for O Fallon High School.
Since 2017-18: students up 5% (2,409 to 2,540); teachers up 18% (131.8 to 155.5).
About O Fallon High School
O Fallon High School is a high-enrollment high school serving families in O Fallon, Illinois. Grades offered run from 9 through 12, with 2,540 students enrolled. For comparison, high schools in Illinois average about 834 students.
O Fallon High School belongs to O Fallon Twp HSD 203.
At 59%, White students outnumber all other groups at O Fallon High School combined. The school is also 20% Black, 9% multiracial, 8% Hispanic, and 2% Asian. That is close to the 60% White share among all St. Clair County residents. O Fallon High School has a diversity index of 59%, compared with 70% for all US public school students.
O Fallon High School operates with 155.5 full-time-equivalent teachers, a ratio of about 16.3:1. That ratio is over the 13.8:1 average for high schools in Illinois. O Fallon High School reports 28% of students eligible for free or reduced-price meals. The 54% average for public schools in St. Clair County is 26 points higher.
O Fallon High School posts an average proficiency rate on state tests of 51.7%, compared with a predicted 55.3%. It is not in the top or bottom 10% of Illinois schools on BeatsExpectations.
In the county around the school, St. Clair County, median household income is about $73,854, roughly 32% of adults have a four-year degree or more, and the share of residents below the poverty line is 10%. O Fallon High School is among the 96 public schools in St. Clair County.
Laverna Evans Elementary School is the closest public school, about 0.6 miles away in a straight line. O Fallon High School is one of several public schools in the area, with at least 8 others within five miles. Nearby schools with test data average 59.3% proficiency; O Fallon High School posts 51.7%.
The school's federal locale classification is Suburb: Large.
Enrollment at O Fallon High School was 2,511 in 2020-21 and 2,540 in 2024-25, a change of less than 3%.
Topics for discussion here include school safety, transportation, and start times. Anyone with firsthand experience at this school can post or comment.
St. Clair County at a glance
View full county profilePopulation
253,694
Census ACS
Median income
$73,854
Household, ACS
Bachelor's+
32%
Adults 25+
Poverty rate
10%
Below federal line
Schools in county
96
40,879 students
Quick facts
Related schools
Other schools in O Fallon
- Fulton Jr High SchoolMiddle · 667 students
- Amelia V Carriel Jr HighMiddle · 664 students
- Marie Schaefer Elementary SchoolElementary · 598 students
- Delores Moye Elementary SchoolElementary · 595 students
- Estelle Kampmeyer Elementary SchoolElementary · 465 students
- J Emmett Hinchcliffe Sr Elementary SchoolElementary · 452 students
Nearby schools
- Laverna Evans Elementary School0.6 mi · 421
- Marie Schaefer Elementary School0.7 mi · 598
- Estelle Kampmeyer Elementary School0.8 mi · 465
- Amelia V Carriel Jr High1.3 mi · 664
- J Emmett Hinchcliffe Sr Elementary School1.4 mi · 452
- Shiloh Middle School1.7 mi · 331
Frequently asked questions
About O Fallon High SchoolHow many students attend O Fallon High School?
O Fallon High School enrolls approximately 2,540 students in grades 09-12.
What age range does O Fallon High School serve?
O Fallon High School serves students from grade 09 through grade 12.
How many students per teacher at O Fallon High School?
Approximately 16.3:1 students per teacher at O Fallon High School.
How diverse is O Fallon High School?
O Fallon High School reports a student body of 59% White, 8% Hispanic, 20% Black, 2% Asian, 9% Two or more.
What district is O Fallon High School in?
O Fallon High School is part of O Fallon Twp HSD 203.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.