600 South Smiley Street
O'Fallon, IL 62269
618-632-3507
Click here for Directions to OTHS Smiley
650 Milburn School Road
618-622-9647
Click here for Directions to OTHS Milburn
706 East Highway 50
Click here for Directions to OTHS South Annex
703 South Smiley Street
Click here for Directions to OTHS Transition House
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