Public schools in O Fallon, IL
10 open public schools with an address in O Fallon, operated by 3 education agencies. Compare size, staffing, grade spans, and school type, then confirm assignment with the district.
Public schools
10
NCES preliminary directory 2025–26
Reported students
7,031
10 schools reporting · NCES 2024–25
Median student–teacher ratio
16.8:1
Illinois median 13:1
Charter schools
0
0 virtual
An overview of O Fallon public schools
The federal directory lists 10 public schools in O Fallon, IL: 6 elementary, 3 middle, 1 high. The 10 schools that reported 2024–25 membership enrolled 7,031 students, an average of 703 per school. The largest campus is O Fallon High School (2,540 students), and the largest elementary school is Marie Schaefer Elem School (598).
O Fallon CCSD 90 operates the most schools here (7), and 3 regular districts have at least one O Fallon campus. City names come from school mailing addresses, which often differ from district or municipal boundaries.
Across schools that reported staffing, the median student–teacher ratio is 16.8:1, higher than the statewide school median of 13:1. A ratio counts classroom-teacher FTE against total enrollment, so specialized programs and part-time staffing can move it; ask schools for actual class sizes by grade.
About 27% of students in reporting schools were eligible for free or reduced-price meals in 2024–25. This describes the community served; it is not a quality signal, and community-eligibility schools can report differently.
School districts and agencies serving O Fallon
Elementary schools in O Fallon
6| School | Grades | Students | Ratio | Compare |
|---|---|---|---|---|
| Dawn Elser Elementary School Central SD 104 | PK–03 | 330 | 10.8:1 | |
| Delores Moye Elem School O Fallon CCSD 90 | PK–05 | 595 | 14.5:1 | |
| Estelle Kampmeyer Elem School O Fallon CCSD 90 | KG–05 | 465 | 15.8:1 | |
| J Emmett Hinchcliffe Sr Elem Sch O Fallon CCSD 90 | KG–05 | 452 | 18.1:1 | |
| Laverna Evans Elem School O Fallon CCSD 90 | KG–05 | 421 | 20:1 | |
| Marie Schaefer Elem School O Fallon CCSD 90 | PK–05 | 598 | 17.3:1 |
Middle schools in O Fallon
3| School | Grades | Students | Ratio | Compare |
|---|---|---|---|---|
| Amelia V Carriel Jr High O Fallon CCSD 90 | 06–08 | 664 | 17.9:1 | |
| Fulton Jr High School O Fallon CCSD 90 | 06–08 | 667 | 18.5:1 | |
| Joseph Arthur Middle School Central SD 104 | 04–08 | 299 | 12.2:1 |
High schools in O Fallon
1| School | Grades | Students | Ratio | Compare |
|---|---|---|---|---|
| O Fallon High School O Fallon Twp HSD 203 | 09–12 | 2,540 | 16.3:1 |
Student demographics
Race and ethnicity share of reported enrollment
- White59%
- Hispanic7.2%
- Black20.8%
- Asian2.9%
- American Indian / Alaska Native0.2%
- Native Hawaiian / Pacific Islander0.1%
- Multiracial9.7%
Enrollment-weighted across 10 O Fallon schools with NCES CCD 2024–25 race/ethnicity counts (7,031 students). Privacy suppression can leave small gaps.
Questions about public schools in O Fallon
How many public schools are in O Fallon, IL?
The current NCES directory lists 10 open public schools with a location address in O Fallon: 6 elementary, 3 middle, 1 high. Together they reported 7,031 students in 2024–25. The count includes charter, alternative, and special-purpose public schools; it excludes private schools.
Which school districts serve O Fallon?
Schools with an address in O Fallon belong to 3 education agencies, led by O Fallon CCSD 90 (7 schools), Central SD 104 (2 schools), O Fallon Twp HSD 203 (1 school). A mailing city is not an attendance boundary; confirm the district for a specific address.
What is the largest public high school in O Fallon?
O Fallon High School reported the largest high-school enrollment in O Fallon, with 2,540 students in 2024–25 (grades 09–12). Size is a description of the campus, not a quality measure.
Are there charter schools in O Fallon?
No school with an address in O Fallon is identified as a charter school in the current NCES directory. Families may still have charter or virtual options elsewhere in Illinois.
What is the typical student–teacher ratio in O Fallon schools?
The median reported student–teacher ratio across O Fallon public schools is 16.8:1, higher than the Illinois school median of 13:1. The ratio divides enrollment by classroom-teacher FTE; it is not an average class size.
Does living in O Fallon guarantee a seat at a specific school?
No. Assignment depends on the district's attendance boundaries, programs, and enrollment rules, which can split a city or cross city lines. Use the district profile and its official boundary or school-locator tool to confirm the assigned school for an exact address.
Nearby Illinois cities
Sources: NCES Common Core of Data 2025–26 preliminary directory (schools, grades, addresses, charter status) and 2024–25 nonfiscal files (enrollment, teachers, race/ethnicity, meal eligibility); Civil Rights Data Collection 2021–22 (AP and computer science). Cities are grouped by school mailing address. Methodology · All Illinois cities