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A−

O Fallon High School

PublicHighGrades 9–12

600 S Smiley St, O Fallon, IL 62269 · (618) 632-3507 · Part of O'Fallon Township High School District 203

O'Fallon Township’s School Grade A− better than 80% of Illinois school districts

Directions
Students
2,540
Students per teacher
16:1
Free or reduced lunch
28%
Setting
Suburb
Grades
9–12
The gist

What stands out about O Fallon High School

  • Its own letter, A−: reading and math results near the top of Illinois’s public schools
  • Math proficiency 6 pts above the state
  • Reading / language arts 9 pts above the state

On the path

Where O'Fallon Township kids come from and go next. The whole path →

6–82 middle schoolsDepends on your address
9–12O Fallon High SchoolYou are here

Test scores

2020–21
Math proficiency32%
State average 25.9%
Reading / language arts40%
State average 30.7%

Its own letter, A−, places these results among Illinois’s 3,406 public schools with results. Source: EDFacts via Urban Institute Education Data Portal (SY2020-21).

Location

Directions ↗

600 S Smiley St, O Fallon

Students

Enrollment by grade
Grade 9619
Grade 10662
Grade 11630
Grade 12629
Enrollment over time
2,511’20
2,533’21
2,521’22
2,559’23
2,540’24

About steady since 2020–21.

Who goes here
White 59%Black 20%Two or more races 9%Hispanic 8%Asian 2%American Indian/Alaska Native <1%Native Hawaiian/Pacific Islander <1%

As reported to NCES, share of students with a reported race or ethnicity.

Parents talk

Questions and answers about O Fallon High School from O'Fallon Township families.

School facts: U.S. Department of Education (NCES), 2024–2025 school year. Test scores: EDFacts via Urban Institute Education Data Portal (SY2020-21). A school’s letter is our own summary of its reading and math results against Illinois’s other public schools; O'Fallon Township’s School Grade is built from its districts’ results. Map: © OpenStreetMap contributors.