Address

600 S SMILEY ST
O FALLON, IL 62269

Phone Number

618-632-3507

Website

http://www.oths.us

Number of Schools

1

Grades Served

09-12

District Level

High

District Student and Staff Info

Number of Teachers: 155

Student Enrollment: 2,487

Teacher Student Ratio: 16.05

--Gathered from public sources that schools and districts self report. These may be inaccurate.--

District PTA/PTO Buying Guide

District Specific Buying Guide

Schools in District

O Fallon High School

Illinois Education Info

Illinois School Registration Deadlines in 2026: What Families Should Know Before the School Year Starts

Illinois Homeschooling Rules in 2026: What Parents Need to Know

Charter Schools in Illinois: What Families, Educators, and Communities Should Know in 2026

Illinois Teacher Certification in 2026: What Educators Need to Know About Licensure, Endorsements, and Pathways

Illinois Public School Transfer Rules in 2026: What Parents Need to Know Before Moving Schools

Parent Rights in Illinois Schools: What Families Should Know in 2026

Related School Info

View All School Districts In Illinois

View All Schools In O Fallon, IL

View All School Districts In O Fallon, IL

View All Schools and School Districts In And Around 62269

Information is generated using publicly accessible school-supplied data and may be inaccurate

Last Updated: 2026-06-14 04:50:07 || School District Id: 5252