📍 600 S Smiley St, O Fallon, St. Clair County, 62269
O Fallon High School is a State/Public serving high age pupils, located in O Fallon, St. Clair County. The school has 2,521 pupils enrolled. The Principal is Daniel Howe. It is part of the O Fallon Twp HSD 203 school district.
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