Contact OTHS
Smiley Campus
600 South Smiley Street
O'Fallon, IL 62269
Phone: 618-632-3507
Fax: 618-206-2468
Email: contact@oths.us
Milburn Campus
650 Milburn School Road
O'Fallon, IL 62269
Phone: 618-622-9647
Fax: 618-622-9630
Email: contact@oths.us